For an MMO, I was thinking of a combat system somewhat similar to Guild Wars. I've heard that Guild Wars has the player choose a limited number of skills to use during combat, and that out of combat they can be swapped for skills appropriate for each encounter. So, I'm currently working on a simple way of building your own spells. You could craft these spells when you're in a city or out of danger, and arrange custom hotbars of abilities for certain situations. It seems more strategic than Warcraft's extreme number of skills, and having all of them loaded onto four hotbars. I can't even find the skill I'm looking for. My question is specifically about the combat-locked skills. If you play Guild Wars, please tell me whether you liked it, or found it frustrating. Personally, I think I would find it a little irritating unless I could have 12-18 skills (probably just a preference from playing WoW). Just wondering how this system appeals to you as a player, and as a developer. I find it best to run these concepts by a wide variety of people.