1) Tekken 7
2) Tekken 3
3) Dragon Ball FighterZ
Tekken trumps all for me. Just the sheer amount of memories... I lost interest after Tekken 5, and not because I thought 6 or Tag Tournament 2 was bad - I was just fatigued, I think. But man... My first game for PS1 was Tekken 2, and the PS1 was perhaps my first real console, although we had an NES (I just didn't bother, when I was that young).
Tekken 3 kind of sealed the deal. I couldn't move to other fighters. I tried so many, but all seemed inferior to me.
Tekken 7 ultimately brought back the passion for fighters, and I've explored some anew, like Injustice 2 and Dragon Ball FighterZ - the ladder definitely being one of my favorite, although I have no experience with other anime fighters and just always had a soft spot for Budokai games (which is why I picked it up. That, and I heard it was made for e-sports in mind, so I figured it had great mechanics and balanced fighters)