Curious... what made you quit after 5? 6 and 7 are wonderful games
Nothing major, or even against Tekken -- I just stopped playing new fighting games at that point and moved on to play other genres of games.
At one point I even owned Tag 2 for... the Wii U, I think. (Yeah, it was definitely Wii U, I remember Nina had a Princess Peach costume and I thought, "WTF"??
). And I enjoyed Tag 2 quite a bit.