745 Saturday Morning
 
Buck comes through chasing doe. Pulls up 50 yards. bangs her gets off. Doe walks passed me about 15 yards up from my stand and into the thicket.
The buck comes straight into my stand allowing for me now shot. Stops 10yards away on my shooting lane. Should I of shot through the chest cavity straight on or did I do the right thing by not shooting? As soon as the doe hit the thicket she ran and away the buck went chasing her. Big 9point nice and tall..
 
Curious as to what you guys would of done.

Very good question and happens quite often.  My only shot doing this turned out well.  It wasn't purely straight on.  He turned his neck and shoulders slightly to his right.  My arrow entered high in front of the left shoulder.  Passed through top of heart and some lung, exiting low near last rib.  He barely made it 50 yards.  This was nearly my last day of vacation.  That is no excuse for taking a marginal shot.  But at 10 yards I could pick the exact spot I wanted.
 
Straight on, you're looking at a single lunger or heart shot.  Not a lot of room for error.  It's a personal judgement call.  I say take what the buck gives you within your own abilities.  Also need to consider the weather factors.  If dry, cold on private property, I'd take a 1 lunger and let him lay down over night.  Might not get a lot of tracking blood with only entrance hole in fatty brisket.  Of course you don't often think of those things in the moment.  But you can plan ahead while sitting on stand up to that moment.
 
I would prefer a straight-on to quartering-to if really close.  Hate those shots where you get to choose between shoulder blade and liver, with a slight window for lung.  If far away (>25 yards in my book).  I'd pass on both.

Pretty much what my dad told me. Said I should of smoked him.
 
Kicking myself!

 
As long as you shoot 3 inch circles out to 30 yards or so and the Deer is still and not gonna jump the shot by seeing you its likely doable..
     That's a tough shot for anybody with only a narrow  target and excellent chance of a wounded deer running around. Gotta remember your shooting on a down angle  with a close deer- it may be hard to get into the cavity even hitting where you aim..
I have generally passed it .The one time I tried it chose to aim high where the neck kinda meets the body. Bled out real quick and didnt go very far at all- watched it go down.
 NEVER feel bad bout passing any shot that you aren't comfortable with- its the best choice. Second guessing always happens but don't let it get in the way of a wise choice.
  Also remember that 'straight on' with a Deer that's actually passing by is likely a bit of a quartering to  shot=the worst lousiest bow shot going.
You did the right thing.

If you look at the chest cavity of a deer head on, the opening is about the size of a large grapefruit at the base of the neck. Miss a little left or right and there is a good chance of a ricochet off of the ribs or one lung if you get through. 
 
If you can put it exactly where you want to, it is deadly. 
 
You have to know exactly where to place the arrow though. Look at some pics of head on deer skeletal structure on the internet that shows the hole. When shooting down from a stand, the target becomes even smaller. 
 
 

IMO that's a poor shot choice with a bow.  It can be done and it can be fatal, but the margin of error is too small for me to ever condone that shot. 
 
 

 
You can kind of see the hole in this picture. The aiming point is higher on the neck than many realize. From  a elevated position, you would be aiming to almost hit its chin. 

He would almost have to be looking up, and i think you DEFINITELY did the right thing passing on the shot.
 
I took a shot almost straight down this year, and it went a half mile, with the wildest most intense 6 hours of tracking you could imagine(I also believe he was jumped by a 3rd party, nevertheless).  Single lung is a BlTCH.  I also took a shot 3 years ago, straight down, and sliced the heart in half, and he took 5 steps and rolled over and died.  Difference was one was quartering to, the other was straight under, spit on him shot.  That "looking at you" shot is tough to pull off with a rifle, much less with a bow, elevated, steep, 10 yards...... 
 
If I were to get the optimum shot, it would be quartering slightly away, 15 yards.  But when does that happen?  Once every 5 seasons?  Always think about the arrow path through the deer, bones, organs, shoulders, etc.
 
One thing I do in practice, I shoot off my roof with short shots, and also try to practice holding at full draw for 30 seconds or more before releasing.  These things help with confidence at pulling off those shots.  Practice throughout season too, even it is just a few shots every couple of evenings.
 
You did the right thing dude!  Congratulations on making an ethical choice, I know hunters much older then you that would have made the wrong one!  You will be rewarded in the long run, it makes for good mojo.....

Eman you made the right decision on passing on the shot. Over all the years and deer that I have harvested only 2 where heading straight me. straight  down the neck shot's both went right down basically where they stood. But that was a all time ago .I'll never  make that shoot again because the arrow went straight down the throat and into the gut and was quite disgusting field dressing them. I used to hunt with a couple guy's back in the day that would only shot at the neck at any direction and always made form a bad time looking for these kinda of shots. The reason they would try that was not to ruin any meat and that is very foolish especially when most of time the deer were not found.  BOW IS NOTHING LIKE A GUN   Keep after him gun season is right around the corner

I'm with the others who said it was a good decision to pass for the reasons already posted.  Better to question yourself and let him go than to make a mistake and just wound him.  
Still have plenty of season left to put a tag on one.  At least you have seen a legal deer.  Still haven't seen a legal buck while on stand this year and I got blanked on deer on Fri. and Sat. evenings.
Still better than sitting on the couch!