Which classes work best with a controller?

This is the controller I have, and it came with its own program called Logitech Profiler. It's a pain in the ass to configure compared to Joy2Key, but I can't argue with its performance. The hubby downloaded a different program that also works with his Aran, but his laptop is shot at the moment and I can't remember the name of it for the life of me.

I've tried Joy2Key and I haven't had any issues with it in terms of using an Aran, I don't think, though I prefer the Profiler since it allows for much larger macro combinations, whereas J2K only allows three key presses per button.
J2K on the other hand allows for fast multi-profile switching, though MapleStory characters can't possibly have enough skills to require more than one switch unless you're some sort of a macro whore (in which case, J2K wouldn't be friendly with you anyways).

Combat Step is a terrible skill to be using with a double tap, by the way, that's why you're having problems with it. Put it on a short cut on your keyboard.
It might also be a problem with the D-Pad on your controller; I recall the PS2's D-Pad being crap.