Applying to Cambridge over Oxford mostly due to the flexibility of course options - you can do a whole range of linguistic and cultural modules whereas the Oxford course is very heavy on the literature. No reasons other than that, and I actually prefer Oxford as a city.
I lived too close to Oxford to consider it. Plus to me Cambridge is more beautiful, and my course has a better reputation at Cambridge generally.
I'll be applying to Oxford this time next year. Why did I choose Oxford over Cambridge?
1. I went to the summer school and fell in love with it.
2. Oxford do my specific course (Biomed) whereas Cambridge does that (imo) stupid Natural Sciences degree.
3. I visited Cambridge and felt unwelcome. People were rude and cold. Oxford is welcoming and I love it.
Surprisingly, the majority of my Oxbridge friends have chosen Cambridge over Oxford.
I live in Cambridge, wanted to move somewhere new.
(Plus, at the time I wasn't confident in getting an A* and also wanted to hide my B at AS... oops!)
Cambridge doesn't offer PPE. I looked at their Philosophy course and PPS, but neither of those appealed to me very much, so the decision was easy.
Oxford but should have applied to Cambridge because they rejected me!
Seriously, I had wanted to go to Cambridge since I was like 9. I had the grades. I'd visited it a few times and loved it. I felt Oxford was more private school and stuck up. But a few friends had gotten into Oxford and told me it was more well known and a bigger, more exciting city. Best of the best. I was confident with my grades, so I made the wrong decision. In my first year of university, I applied again just to Cambridge and they were really keen to interview me. As in I got about 10 missed calls from them. Emails too. One basically said you'll have a very good shot, if you'd just respond! But I was enjoying it at uni, so I left it. Rescinded the application on UCAS. I don't know know if they really were keen to have me or if they just like to interview everyone they can.
Edit: I honestly don't understand why 6 people disliked this comment. Because I misinterpreted 'choose' as I was rejected? If you dislike it, please quote me and explain why exactly.