The most noobish noob thread ever..

I'd say the D-pad. With the D-pad you can input your commands a bit more precise than the analog stick, but it's all in personal taste really. (Arcade stick beats all though)
If you're having trouble with the outcome of your input, then try putting on that command input history in training mode to see what the problem is while inputting your commands. You can find out you might be holding down backwards or something else while you shouldn't do it.