I played EQOA on PS2 for 4 or 5 months before it got so boring I couldn't stand it any more. I got to beta test Final Fantasy XI and that had a lot more going for it. I should be getting the HDD with FF XI in the next week or so and I think it will be a lot of fun.
As for how much it costs to play MMORPGs, it all depends on how you look at it. I use the dollar an hour rule. If a game costs $50 and you play it for 50 hours, then you got your money's worth. When it comes to monthly fees, if it costs $10 and you don't think you will play it for at least 10 hours then you probably shouldn't get it. Like most things, it all depends on your point of view.
Jeff