In this post I am going to give a couple of my top tips to consider when choosing a Cambridge college. These are not the only things you should consider when choosing a college at Cambridge but they are a good start.
Big vs small
One of the broad differences between Cambridge colleges is the size of the college. Here I am referring to size in terms of student numbers. The number of students in each year at a college can vary greatly, from under 100 to over 150. Small colleges such as Corpus Christi will have a very different feel to larger colleges such as Trinity. At smaller colleges, you will know a large number, if not all of the other students by name. This creates a different college atmosphere to at larger colleges where you will know a smaller proportion of the students there. I do not think that the size of the college makes that much difference but I would broadly favour larger colleges over smaller ones.
College location
Another key factor to consider when choosing a college is the location of the college. This is important and varies greatly. There are quite a few central colleges which are right in the heart of Cambridge such as King's, Caius and Trinity. These will likely be very near to your lectures which is very convenient. They are also near to all the local Cambridge town shops and amenities which is useful. In contrast, some colleges such as Homerton and Girton are far out from the city centre. These are not as convenient although some people might not mind being far out of the city. If you go to one of these you'll probably end up doing a lot of cycling to get to lectures or if not then you'll end up getting the bus. This is not as convenient and creates a different sort of environment where you have to commute in for lectures then leave to go back to college in comparison to central colleges where you can go in and out of the city in a few minutes very easily. I would say it is definitely preferable to be at a central college to a far out one. However since central colleges are on the whole more popular with applicants, they might be more difficult to get into which you'll need to take into consideration when choosing a college.