Any fun in depth mmorpgs?

Lately i have noticed that i have been enjoying the games that make me think and plan (char advancements and how i handle the situation) so much more than i do games like cod, skyrim, minecraft etc. I love dark souls and loved mech warrior online even tho it destroyed my comp but i was wondering if there were any mmorpgs that were as in depth with char development and strategy

Try rift. Its free to play and its fun too