I liked Tenkaichi 2 the best myself. The equipable stat buff system was a lot better in 2 then in 3. But I loved them both.
All the ones I played this gen just seemed dumbed down and simplified. I remember playing Tenkaichi 3 and struggling with some of the advanced tutorials then struggling even more to incorporate them into my play style. I also remember big 13-14 button combos.
Every one I played this gen was simplified to the point where the tutorials were over in 2 minutes and the combos consisted of pressing the attack button multiple times.
I still enjoyed them, but I think that's more a love of DBZ then a love of those games.