Clinical was more enjoyable for me than pre-clin, because it felt like you were finally doing proper medicine (I was at Cambridge, so a fairly dry, hands-off first three years). Not as much fun socially as pre-clin, but still enjoyed it most of the time.
Cambridge sends its students on placements all over East Anglia, so a lot of the time we would stay in hospital accommodation in the week and come back to our own place for the weekends. Most of the time this was quite fun, though the quality of accommodation was highly variable! Got a bit wearing in final year when I was also in a LDR with my boyfriend in London, so seemed to live out of a suitcase for the whole year. It is much more like having a job than being a pre-clinical student, you are generally expected to be in hospital 8/9-5ish, plus occasional on-calls, and you rapidly go off the idea of getting outrageously drunk during the week because doing a ward round with a hangover is fairly unbearable. However, I don't think anything really prepares you for how stressful being an actual doctor is!
We had a formal lecture week at the end of each block, and during the placements we would have a variable number of smaller lectures and seminars on relevant topics. The rest of the time you were expected to be on the wards or in clinics. Some placements were a lot more structured than others, and would allocate you to a particular ward/clinic/theatre list each day. Both approaches have their pros and cons - some of my best learning experiences were just from being on the ward or following "my" team on-call, but if there's not much going on, it's easy to feel a bit lost and like you're just in the way. Knowing that you have to be in a particular clinic can be helpful, but if the clinic is cancelled, or too many students turn up, or it's just not very interesting, then you're stuck there and it's hard to know where else to go. My top tip is to try to get to know the junior doctors on your firm/ward, and be enthusiastic about helping them out on the ward round and with jobs - you're much more likely to get teaching that way.
Our exams were a mixture of written (MCQs and short answers) and OSCEs, which are practical exams of your communication/examination/practical skills. We had one big set each year, and a couple of smaller ones at the end of certain modules. I got less stressed over them than I did over pre-clinical exams, but they're not easy.
Hope that's vaguely helpful!