Budokai is one of the first games I remember playing on the PS2. It has to be at least one of the first 5 games I saw on the system. I played a bunch of it with my brother and my cousin and we are all big DBZ fans. A couple years later we got Budokai 2 and I was amazed at the improvements. Along the way we rented Sagas and I remember him hating it while I was fine with it. Eventually we got Tenkaichi 2 and played a ton of it and after my brother moved out I was lucky enough to find Tenkaichi 3 for $20 at a Gamestop and played way too much of it for the rest of my high school years.
Needless to say I have a lot of history with these games.