Godfather 1 is a lot better than Godfather 2
I used to like Godfather 2 more when I first started getting into movies and the artisty side of things (I used to really love the Young Vito / De Niro scenes particularly) , but I do think now that the First movie is the best and by quite a distance.
It is just more cohesive, sharper and coherent, 2 feels like it has too much padding now, and some of the storylines are a bit clunky (Fredo just loudly revealing his secrets etc)