Pre-Cu Star Wars Galaxies. Best MMO ever made until it got pissed on and turned into CU and then NGE. Theres a community dedicated to bringing it back in all its glory without classes and full freedom like it was pre-cu at http://www.swgemu.com/ Theyve come a LONG way so fast and they will probably be done somewhere bychristmas, or early next year. And since its an emu, it will be completely free and no monthly fees.

I mean, that game had flexibility!7 differentstarting paths: ArtisanBrawlerEntertainerMarksmanMedicPoliticianScout

And 26 Elite/Hybrid paths off of those: ArchitectArmorsmithBio-engineerBounty HunterCarbineerChefCombat MedicCommandoCreature HandlerDancerDoctorDroid EngineerFencerImage DesignerMerchantMusicianPikemanPistoleerRangerRiflemanSmugglerSquad LeaderSwordsmanTailorTeras Kasi ArtistWeaponsmith

And you could mix and match them to your delight, as you werent restricted to one path! Better than KOTOR in my opinion.