People tease people who go to Girton cos Girton is a funny name.
babyballerina has a point about people's obsession with prestigious colleges, but i dont see what's wrong with that. Part of the charm of going to oxbridge is that it is stooped in academic history, and most people want to feel a part of that history, rather than just being at any old university. Teaching standards at oxbridge arent that much higher than at other universities, and in fact, standards at other institutions are even higher for particular subjects, you just have to look in the subject league tables to see that. People want to go to university not ONLY because of it's high class teaching facilities - i certainly did not make my choice of universities based on this factor alone.
If you feel that you just want to be at cambridge, because it's cambridge, then that's fine, nobody is gonna treat you any differently for not caring which college you go to. A lot of people feel like this. But then again, a lot of people like to have that little bit extra that oxbridge has to offer - i certainly do!