Ok, sure if you're using Photoshop in a very amateur/photographer (i.e. just rebalancing stuff, cropping, a bit of cloning or watever) way then I accept that PS is slightly more transparent in its presentation of such tools, though not by as much as you claim. There are easier to use programs for that kinda thing though and it's not really the predominant use of photoshop these days.
Using either for graphic design (as I do a lot for work) is an entirely different kettle of piss and they're about equally unintuitive. And as DXMSMXMIX says, one costs £700 less.
I don't think the GIMP is particularly good but I don't think it's much worse than photoshop (the only major failings of the gimp being lack of hardware acceleration and CYMK support (though I don't personally care about the latter, I do very little for print), especially not in terms of usability. Given the price difference and difference in philosophy I'd much rather use the GIMP (though I'd rather not have to use either).
Why is it only Windows and Mac people advocating using Photoshop?
Dick.
If popular means good then I guess you'll accept that IE is the best web browser.
I can do what I need to do in either application (I use them for work too). I just don't find it pleasurable, ever. Both of them piss me off. Unlike, say, Artrage, which is a pleasure to use (not in the same application as PS/GIMP though).
I don't know how much of that is bad design and how much is just the inherent complexity.
I use the easier to use programs for that kinda thing.
I want an editor that supports complex layers, proper masking, all the standard raster and vector tools, decent text tools with leading and kerning, and so on.
As I've pointed out, I keep trying GIMP hoping that someone has come along and made it not shit, but every time I'm disappointed.
I should be more annoyed with Photoshop because it's got a huge team behind it, is Adobe's flagship product, and so on - probably in terms of time/effort/money expended PS is by far the worse piece, but it still doesn't make me as angry as GIMP does when I try to use it.
Because producing Photoshop for Linux probably wont make Adobe money, and that's the only reason they'd do it for.
I'm coming to suspect that it's you who's shit :Y