I moved to 11 and never looked back. My guitar sounds much more fuller and the feel is definitely different from 9, but it is true that it feels less comfortable, especially when you try to do bending at the first few fret, it's killing me. Oh, and I snapped a lot of strings back when i still use 9, now i don't snap any strings anymore.
but as always ymmv, the tone aside just play whatever you feel comfortable with, that's the most important. Tone is subjective.