Looking back I have no idea why I was so hooked, but I can't say it won't happen again... that's why I've come to put more emphasis on combat. Many if not most of my favorite moments in wow have been from hair pullingly frustrating solo fights that I insisted on trying again, and again... and again. And finally pulling it off somehow.
Not sure if MMORPGs will ever bother making solo content really difficult, but I'm always holding out hope... in TBC they actually did ramp up the difficulty a few notches, including some quests where the difficulty even lay beyond basic combat - I'll never forget the dragonmaw race or the degrader in Blade's Edge Mtns (those were examples of designers putting as much thought into solo play as they normally put into pugs or even raids)... unfortunately once WotLK came out, that trend was brought to a screeching halt.
But if I could find a new MMORPG that gave you enough solo challenge to really push your toon to the limit - THAT would get me playing for certain. Even if they don't have hunters.
