Perfectly put - 3rd year is exactly like having a brand new job every 6 weeks - and, by the time you get a hang of it, you move on. The good news is that you can always do electives in the things you like, and never again in the things you don't.
And it sounds like you have more time to enjoy yourself right now. On Psych, I had a lot of free time and very little call, so I got a lot of knitting done. Kind of like 4th year