I'm in a similar situation, quit UO after a year and finally quit EverCrack after 18 months, since then I've been on FPS. Nice, addictive but manageable FPS. I've logged maybe 200 hours on Desert Combat, it's quite fun, you just don't get the lows. The capacity to lose days of work and spend a long time hopelessly trying to get back to your body because you've lost everything that you've achieved to a chance train, or PK, or high-level spawn is what makes MMORPGs destructive to your emotional well-being. The capacity they have to completely eclipse your offline life if you get into them is destructive to everything else.
Here's a post I made in a thread about Ragnarok Online, the same principle applies to non MMORPGs:
Not really as addictive as EverCrack or UO, but there is an upside: None of the negativity involved in death.
When you die in RO, you go back to your spawn point with 1 health and everything you had beforehand.
As a person who has spent 8 hours in tears going back trying to find my corpse 7 zones away in EverCrack, and dying every time I get close enough to see my corpse, or spending 5-6 hours running back and forth in UO getting PKed and losing all the work I've put into my characters' stuff for the last month, I find it oddly comforting to find a MMORPG where death means almost nothing. The feeling you get in the pit of your stomach when you realize you're in a situation where you're going to lose everything, it just doesn't happen in this game, and I love it for that.
Personally, I'm fine with being addicted to games, as long as I don't suddenly have all my achievements(in FPS, your skills, in RPGs, your belongings) lost to me, making weeks of work disappear.