I'm not "most used to" Xcode at all. I've been using Xcode in a hobbyist capacity for six months while I've been using IDEA professionally for four years.
Xcode simply feels like it belongs. It acts as a Mac app should act. AppCode doesn't; it's unpredictable, lacking in basic features like Counterparts, and still kicks me out to Xcode just long enough to remind me how much nicer Xcode is to work with. Code generation and refactoring is very pleasant to have but not as important as being comfortable to work in for hours at a stretch (and AppCode isn't worth the price just to employ it for a couple features for a hobby project).
Xcode simply feels like it belongs. It acts as a Mac app should act. AppCode doesn't; it's unpredictable, lacking in basic features like Counterparts, and still kicks me out to Xcode just long enough to remind me how much nicer Xcode is to work with. Code generation and refactoring is very pleasant to have but not as important as being comfortable to work in for hours at a stretch (and AppCode isn't worth the price just to employ it for a couple features for a hobby project).