If you play a lot of single player games, particularly RPGs (Skyrim, The Witcher 2, that kind of thing) then yes, an SSD is worth it. Those kinds of games often have fairly substantial loads, sometimes fairly regularly too depending on game and what you're doing.
If you mostly play multiplayer games, then I wouldn't bother. You have to wait for other people to load anyway and your experience will benefit more from a better GPU (especially for future proofing). Waiting an extra 15 seconds for your computer booting up isn't worth downgrading on your graphics.
If you play things like MMOs, then it's up to you. Often they don't need high end machines and you spend a fair bit of time loading anyway (in and out of dungeons for example). At the same time though, load times are fairly short generally anyway.
When I got my machine I was mostly playing MMOs and FPS games, I went for the better GPU. I have an SSD too now, if I had to choose between a better GPU or an SSD again, I'd probably make the same choice of a GPU. Most HDDs load fast enough anyway.
The fact is that games are designed with HDDs in mind, on an entheusiast forum like this it's no surprise that so many people have SSDs, but they're not that common with most people (a lot of people have never even heard of them) so there's not going to be any games for a long time that are designed with them in mind, that means that you'll always get the intended experience from a game with a normal HDD.
