I'ld say DDO...
It has the nicest player base I've ever been around. Very helpful people. Most of the game can be done solo, difficulty scales with amount of people in a dungeon as well as the difficulty you choose. Plus it's free and free = casual IMO why pay for something that makes you feel like you have to play it every 2 seconds in order to get your moneys worth when if it's free you play simply when you feel like it. I personally just hit level 8 (of 20). and find it to be a very fun and interesting game (I did play WoW for 2 years).
It has the nicest player base I've ever been around. Very helpful people. Most of the game can be done solo, difficulty scales with amount of people in a dungeon as well as the difficulty you choose. Plus it's free and free = casual IMO why pay for something that makes you feel like you have to play it every 2 seconds in order to get your moneys worth when if it's free you play simply when you feel like it. I personally just hit level 8 (of 20). and find it to be a very fun and interesting game (I did play WoW for 2 years).