This is how I feel exactly. Whenever I throw forehand drives, the disc comes out all wobbly. I'm very confident in my forehand approaching, great little flicks for from out behind trees.
It's not that I cant execute a good sidearm 2 out of 3 shots, it's just that I lack the "confidence" in them. Mine dont get wobbly, it's just that it takes an almost pin-point accurate release where-as with the backhand it just feels more natural.