A crucial thing to remember in a shared code base is that taste is ultimately subjective, and to let it go when people do something different from you so long as the code is understandable and not objectively incorrect. Remember you're making something functional at the end of the day, not ASCII art.
Yes absolutely. I think harmonizing with things around you is part of good taste. It's one of the things that separates for example a professionally designed interior from a college dorm room filled with an eclectic array of things the occupants like.
