1) The Homes. This is one thing which some other popular games will never have. The housing system has been developed so extensively over the years. No other game can touch the housing system in UO. But, that's just my personal opinion. 2) UO Isn't group based. This has it's pluses and minuses. I like the idea of being able to get "really good gear" without having to be with 24 other people.... or even having to wait 45 minutes for a chance at "average gear." And, then feel "forced" to play a dungeon every single dang day for every day of the week. There goes 1 1/2 hours every single day just to try to "keep up with everyone else." And, even if I only do 1 1/2 hours I'm still not going to come close to having "decent gear." 3) This is similar to the prior one. I can go a month without playing and still be "competitive." What do I mean by "competitive".... it means something different to every person. I don't pvp. I just like the feeling that I am competitive whether I am or not. In other games, It's pretty clear when I'm not competitive. So, I guess I like the fact that every hit or heal in the game isn't measured and spammed to everyone you know. 4) The Sandbox: The content isn't spoon fed to me. Content isn't recycled every few years and told "the story has progressed" so we're making you kill Ragnaros and Nefarian yet another time... even though you spent 100 days of real life time killing them the first time around. 5) Graphics. I like the UO graphics. It does take some time to get used to them if you haven't played in a while. But, once you get going... it really seems better. Overall: I can have a life and still play UO. And, I don't have to schedule my life around the guild raid schedule or lose my spot on the team. I can play as little or as much of UO and still feel like I'm "in the game." I also don't have to ever go to a popular bank and see people's E-Peen. IF I want, I can just go to Fel Buc's den and see the bank or visit NPCs if I want to.