I didn't have that problem, but yeah, some people definitely have. I actually went with the lightest spring because I found that the desk surface I was using the stick on was too slippery for the rubber mats to actually keep the stick in one place
Another thing - apply a little bit of a dead zone to the stick x y z axes. I've noticed that otherwise, even when the stick's centred, you'll get a bit of drift.
Also I found setting the throttle tension to the lowest level helps with fine control of speed, and also allows you to operate the throttle with your pinky whilst reaching down to the toggle switches to the right hand side.
Having said all that, I am a terribly flyer - I'm just much better than I used to be with mouse and keys
