From an "average thickie" perspective...
The main thing that absolutely infuriates me about the entire linux community is the assumption that open-source versions of commercial software are in fact, superior. With openoffice, I would agree, use it all the time.. others are not so good though.
I tried running ubuntu last year, and asked a few questions on a forum that was apparently supposed to offer help to anyone new to linux.. sounds great, right? All huggles and help and open-source love?
Problem 1 - Hardware glitch. Didn't need to ask for help on this one, the online instructions were very clear. Ubuntu, the operating system is excellent to use, brilliant compared to Vista.
Problem 2 - Flash doesn't work online. Now, this might not seem very important, but I happen to like watching a few online vids and playing the odd stupid game. When I enquired about why it wasn't seen as important, I got a big rant about how Flash was only used to spam pointless adverts on the net and that it was a closed adobe piece of bloatware yadda yadda...
Problem 3 - Photoshop doesn't work. No, not even in WINE, unless you want to use a seriously outdated version with no support for the batch image processing scripts and plug-ins that I like to use.
The answer "use GIMP, blah blah Adobe sucks, GIMP is better".
Okay, fair enough... time to try out the GIMP. There are some serious design flaws in that piece of software. The inabilty to select brush width from a sliding menu is utterly insane, yes, I could go into the brush menu and create a new custom brush, but that's just obtuse. The lack of being able to have a seperate brush size at the same time for a brush and eraser is terrible, too.
I relayed my concerns to the GIMP community and was advised "it's just different to photoshop, but it's actually better once you get used to it". More fobbing off rather than admitting an area where their work needs to be improved.
I reinstalled Vista shortly afterwards. Sorry open-source community, but you need to be a lot less patronising and blindly "our stuff is better, lalala not listening" if you want your hard work to go mainstream, and seriously work on program compatibility.
It really was a shame, since Ubuntu was genuinely much better than Windows to use, and the GIMP even has better support for my wacom tablet than photoshop does, with a variety of extra things that can be customized to the level of pen pressure.
Software compatability is the #1 problem. People don't "use" OS's, they use programs. The OS is simply the thing that is there to make the programs work, and right now, Linux does not do that.