I think coppers are fun and really easy to achiee because when you lift you have warmth! The wella reds are meant to be the best, I still haven' tried the innocence red, I've been told that is the "truest red".
When I was at college there was a client who used to have 8/43 with /33 mixed in, it was very bright haha.
So have fun play around, you will find some mixes you love