Champions Online -- Free?

[Ayiekie]

YMMV, of course. But I'd actually say most MMOs are in fact fairly interchangeable to most people - medieval fantasy games with elves and whatnot that have levelling, quest, PVP and raid systems that are similar in broad outline if not detail to WOW (which itself draws from older MMOs but is obviously the current standard). Champions, of course, isn't one of those - it is primarily a competitor to City of Heroes (superhero games with easy travel, colourful graphics, a bigger emphasis on storyline, which encourages many alt characters rather than just focusing on one), although it's worth mentioning that many people don't even consider them to be broadly that different from D&DOnline or WOW.