I do PL bench too and I def feel it more in those muscles than my pecs. Only when I do high rep, super strict bench press I get some kind of pec soreness.
My pecs are kind of small but I rotate floor presses, DB flat / inc press and DB flyes to get some more size.
You've said you feel a bit too fat for your liking, tight? You don't think it's your diet?
I might be wrong here, but I get the impression from your posts that you eat a lot of fast food with fries, bread, etc. That stuff has a lot of bad fats and sodium and makes you hold water, looking bloated. Try eating the same calories but clean up you carb sources. Eat mostly rice and potatoes and limit wheat and legumes for less bloat and optimal starchy carbs. I def look better while doing so and I know Coldsnap has commented on it too.