For me, it's a toss-up between Psychology and RS. Psychology I enjoyed and I gained quite a bit from it (also it's not a doss subject, the difficulty's fine but the quantity of stuff you have to learn is sizeable) but quite a lot of it is common sense and I do wonder whether I'd have gained more studying a language (adored French and Latin at GCSE) and researching psych in my spare time. And I loved the ethics side and some of the philosophy side with RS, but some of the philosophy was unbearably tedious and I also had a lot of trouble with my teachers. Still, all in all I'm happy with what I took and I'm going to do the subject I love most at uni, so no harm done. I guess if I picked my ASes now I'd probably have done the same thing, just might have traded Psychology for French and then dropped Biology as I did anyway.