I played fine on 360 pad, only issue was accidentally getting back or down instead of downback, so I got a stick. I used PP and KK macros and called assists with right stick. Punches aligned to left, kicks aligned to right.
I played fine on my qanba q1 on square gate, after a long adjustment period, but I liked to ride the gate, as I rode the 'gate' on pad (circle), and I wanted that for QCF/QCB/360/etc
I switched to octogate, and played fine on that. I liked the 8 corners. I could find downback. I could lock to a corner to ensure DP. I could ride the gate like a lazy butt and get my circle motions.
I could tilt the stick slightly in my lap, causing downback to suddenly become back or down, leading me to fail to block again or do inputs correctly.
I could burst into a fit of screaming rage. A lot.
I decided to purchase a hitbox and immediately began grinding rekka combos in KOF XIII on the keyboard on hitbox layout.
I got my hitbox. I jumped with my thumb. Unfortunately, I was trying to do LK, because on my stick, my thumb was LK, not jump.
I jumped in people's faces. A lot.
I couldn't do normals right after jumping after a launcher, I couldn't jump cancel right after launching. I made a lot of janky combos to get by.
I grinded. I got good. I did HCB into DP loops with EX Iori. I did barrel loops with Double. I did Valentine combos.
I learned to jump with either thumb, predominately right. I learned to do 360 motion, though only really cause Mike Z is nice to hitbox players. :^)
I learned to input assist calls manually again using my new finger arrangement.
I still can't hcb as reliably on P2 side as P1 side, because I slide on one side (hitbox technique) and finger on the other.
But I work to overcome the execution barriers as I meet them. I learned to fly up and forward with Painwheel in combos, and down and forward, and learned to do diagonal blitzers with Beowulf.
I learned to double tap kicks or alternate kicks for flight and fiber upper.
Now I'm doing directional rekka combos with Akihko in P4AU and I can do my tear toss routes with Parasoul again.
And I could find downback, good God, I could downback, like a scrub, and get hit by all the falling normals my opponent throws out when I still fail to flash kick and get sHK.
And it's wonderful. And it's all preference.
Use colossi's screwdriverdualshocknumpad thing, imo.