I like c6 a lot. It's a really good opening if you want to improve your game. I don't think that choosing an opening or another will change the charachter of the game. Anatoly Karpov used this a lot and he has excellent positional games with this.
Anyway I also play e5 and I like a lot the Petroff (russian game).
So that's just your decision. Anyway Garry Kasparov wrote that begginers should learn open openings and then semiopened and closed.
Thank you everyone for your interest !!