DD1 wanted Univ, had a terrible interview, was sent over to Magdelan, had a great interview and was offered a place. It was the college she least liked on her tour, and would never have applied there, but she had the most fabulous three years and made lifelong friends.
DD2 wanted Worcester, had a terrible interview and was rejected by Oxford. Three years later applied for a Masters. She wanted Merton, but got St Hughes and was very disappointed. However, it turned out to be a great college, away from the crowds, and easy to walk or get the bus, Oxford is really very small although she spent a lot of time on the buses between Hughes and Iffley. Despite being a "poor" college, the accommodation and food was good value, and they subbed a lot of her sports expenses.
You also get to meet other college members on your course, and invariably get let in for bops, drinks, and other entertainment. You are not restricted to your college only.
So..... pick a college, but don't get too invested. As other have already pointed out, you never know where you might end up, and an offer, is an offer, take it and have a great time.