I think a lot of trainees are in the same position as you, Legal Fool, I know I am.
I do reason though that trainees are given difficult, tedious and annoying files. Perhaps things are not as as bad when qualified, as you get more experienced. Job satisfaction is crucial though, if you don't think you could ever like it and you know you'd like something else, then go for it.
I wouldn't put too much hope in becoming a teacher, very hard to get permanent jobs in teaching either at the minute, afaik.