The competitive scene is bigger than Tekken, heck even Smash Bros is!
It's easier to pick up and play. For me anyway.
I've never been one to spend a great deal of time trying to master a character or learn combos.
I just jump on play for 10 minutes then off again.
Tekken I found was perfect for that as was street fighter and I enjoyed dead or alive too.
However MK I struggled with. Smash Bros again I struggled with but I never gave it a proper chance as I went straight into online and was probably playing against well experienced players and literally my first ever game.
I have bought a razer panthera Evo however that's for a retropie set up for an arcade build. Mainly street fighter, streets of rage, double dragon style games. I'm going to get the hori hayabusa for the switch as well as I have a few games on there like street fighter and streets of rage 4