TwoSix
Everyone's literal second-favorite poster
No, but just saying I'm better at bar fights doesn't make me want to get into bar fights. If my flaw was "A little bit of a prinking droblem," then sure, absolutely. Knowing that I'm good at bar fights does make me want to get in them more. If I take Dungeon Delver, I want to go to dungeons more.Why? What does mechanically differentiating your character make it better somehow? Does not having the feat prevent you from getting into bar fights? All the feat does is make you more powerful when getting in bar fights. It certainly doesn't make bar fights somehow "better" or the character "better". All it does is make them different in a very small and inconsequential way. Exactly the same as saying "I like to get into bar fights" in scope.
I find only one of those conversations interesting, but it's probably not the one you do.However, in one case the conversation is about the character and in the other it's about the mechanics.
Contrast:
"I punch that guy in the face!"
"Not again! Why are you always getting into bar fights?!?"
"Shut your face! I love fighting!"
vs
"I punch that guy in the face. I do more damage because I have Tavern Brawler!"
"I thought about taking that feat. But I didn't think we'd get into enough bar fights to make it worthwhile"
"That's why I'm starting this bar fight. I took the feat, I'm going to darn well use it!"