While waiting for the next big MMO, heh, I've recently made my (5th?) return to DDO. I love how they've managed to keep improving this game through many free and paid updates and expansions. My main character is on his 10th life, and I think I'll finish him up to 20 then spend some time exploring the new Epic Gianthold. Should be pretty fun. I don't think DDO gets enough credit for many of the innovative things they've come up with, from reincarnating your character, to 'actiony' combat, to hand crafted dungeons with interesting options and clever designs that include traps, secret doors, optional bosses, etc.
There's a pretty steep learning curve, but if you just start out at level one and work your way up through the content, you'll pick things up as you go. I think people get overwhelmed when they try to obsess about perfect builds, and understand all the different types of crafting and character development form day 1. Just play it, enjoy it, and let that stuff sink in over time. Your first character can either be adjusted or reincarnated if you make a choice that you view as a mistake down the road.