Environmental Science was one I was looking at this morning
School, my science GCSE was a double award in Physics, Biology and Chemistry, then went on to A Levels but was on a completely different path back then so my A Levels are all art and design related. Now I'm back in college doing a BTEC Extended Diploma in Animal Management, currently in my second year and I've selected the science route so I'm doing Breed Development, Breeding and Genetics, Biomedical Science, Microbiology and an optional unit in Genetic Manipulation. Sort of broad but also lots to do with genetics
Trouble is I'm not altogether sure what interests me most. Molecular Biology & Genetics is the main course I'm looking at... but being quite specific I don't know if I want to go down that route and then like you said, get bored of it.
I don't know what I want to do. I started this course because I like animals and thought why not, but it turns out I don't really like animals that much

I like the insides of animals, how they go together and stuff, I'd much rather learn about DNA synthesis than touch a rabbit.