Stick is VERY difficult to transition to from pad, no matter what you hear. People tell me they can get it within days but that's bullshit, if they can then they probably had prior stick experience. I've never ever played on a stick before, ever, and the only fighting game I've played was guilty gear, so even getting used to the game on pad took a while for me. Transitioning to stick will now probably take even longer than learning the pad, because now I already have habits that I've developed on pad that I have to break. Plus, it's frustrating as hell when you know you can do something easily on pad and it just doesn't work out on the stick. I'm positive that had I never known how to play on a pad and went directly to stick, it wouldn't be this hard to learn.
Anyway, I've already spent almost a week practicing bridget on the stick. Since it's a new character for me, maybe that's why it seems exceptionally hard. For me, I sometimes need to come up with different motions on the stick to accomplish something I could do on the pad. For example, although this may sound absurd, IAD (9 6 on the pad) is easier to do using 6986, and DP (623 on pad) is easier doing 64123.