I've wondered the same thing myself. I'm wondering if it has to do with calibrating the sensitivity of the device, or maybe even the software. That's my guess at it, I was thinking about it the other day. I'll watch this journal to see if anyone posts anything helpful so I can learn too.

Well, I haven't found any clear-cut answers, but here is some things that I did find:
Some people suggested the nib (the 'point' of the stylus pen) should be tampered with, or replaced. Some nibs even have different options to imitate different brush strokes and can be removed. Some say if it can't do that, to just clean it out.
One person said to check the sensitivity levels on the program you're using. In Gimp, it's in the Toolbox, and they have several different options to tamper around with. This one's probably your best bet. (Some tablet's software lets you actually adjust sensitivity levels in their configuration settings)
Another said replace the pen. It's a whole lot cheaper than buying a tablet with a new pen. Some companies have you send in your tablet to get a pen replacement. Why? I dunno... o.o;

Those are some solutions people had, anyways. o: Hope that kinda gives some insight. Got it here http://browse.deviantart.com/?qh=&a.....ablet#/d2ebluf

Wow, thanks. I should probably update my tablet someday (Had it for four years)...and when I have the patience-learn all the options it comes with. And I will have to play around with Gimp to see if I can come up with anything I like. I've heard of replacing the nib, I never looked into it before. Maybe now is the time to start. x3

Thanks for the link.

By update I mean get a new one. I have the same tablet as the person who posted that entry! x)
Looks like it's far outdated. But I don't know.

Well, glad that it was of some use to you! One wouldn't think that an input device such as a tablet would require a replacement every few years, y'know? They just seem like they'd be a lifelong investment. Such a pity. ;;