I play the probably slowliest but also most powerful build DDO offers. Its defenses are low, its dps are low, its hp are low, its killspeed is low. I need a Divine or Melee Hire to solo quests. I'm not good in avoiding hits or mitigating damage and thence have to be very cautious proceeding in dungeons.
The fun playing this build results from its entire unimpressiveness, mobs tend to laugh at me at first sight and never ever would consider me to be really dangerous.
There is nothing special about me. Actually I rather look perfectly harmless, merely like the prototype of a victim instead of a winner.
I do not cast Fireball, Finger of Death or Disintegrate. I do not attack with weapons and I never shoot projectiles (except on levers). In fact I seldom do damage on my own. But when I reveal my hidden powers, it's like a twist of surprise and I can turn a previously forlorn situation, that would make heavy armor wearers and instakill casters shivering, into a cakewalk. I can transform a hostile area into a safe zone without suffering a single damage point. I can clear a whole wilderness with echoed 12 sp only. I thank the devs when boss monsters have adds. I'm rather happy when encountering waves of mobs or huge armies. Be it humanoids, constructs, elementals, demons, undead or animals - in my eyes they all are puppets and I am their master. From a distance I make them kill themselves. I split the combat scene into more than only one. I make any desired number of enemies become my minions, fighting to death on my side.
My powers are pretty unique but many other players rather find them annoying or even hate them. It's because this build concept is the total opposite to dps/instakill/tank&spank ones that have to apply direct damage to overcome enemies. And it slows the progress speed down a bit.
Small complaint: nevertheless devs still seem to consider my powers op and mobs on EH and EE additionally are warded specificly against them with no possibility to compensate it - which makes it rather impossible to solo these difficulties. This feels like a disproportional unjust punishment, because in groups I'm often enough asked to not make use of them.
But DDO is the only MMO I know of that allows to play a build like this (in lot's of content). And because it's so different to other build concepts I like this gameplay the most, this will always be my favorite. I don't know whether there are lot's of players playing a similar one. I guess it's just a few ('cause no pew, pew)?
For players interested in the specific build: it's a DC caster Wizard, varying between 18/2 and 17/3 splashes, focused on Enchantment. I play on Wayfinder, so on nearly every toon/life I splash at least one Level of Rogue or Artificer for trap skills to be as independent as possible.