Theres 2 main control methods:
The TvC layout:
A B C (fraud button)
S A1 A2 (fraud button)
MvC2 layout:
A C A1 (fraud button)
B S A2 (fraud button)
I use MvC2 layout, as did a lot of QLD players, but a few have switched to TvC layout due to the better layout for chars like magneto where tri dash instant overhead A is effective. But as YOLO said, its purely personal preference. As demonstrated by godly's layout, haha

My layout:
A C A1 (B + C)
B S A2 (A + C)
the extra buttons are for dashes, depending on what move I lead in with, if hitting with A, then dash with B + C, if hitting with B use A + C dash