I was into it a lot for about a year, now on-and-off.
I liked it at first coz it was cheaper than drinking and a much better feeling, never came down as hard as my friends.
Then again, i was usually more down anyway. I guess I was used to depression.
You're right though, once you have to take 2 or 3 to feel it, time to stop. Apart from health issues, it becomes expensive.
Takes me 1.5 to really feel it these days, with the eye-wobbles and that (depending on pill quality).
Now I prefer LSD - cheaper, cleaner, lasts longer, more fun (in the right circumstances).