You seem to have triple posted, Geoo89! I deleted the other two since they were exactly the same as the first.
I somehow like this attitude. I think the levels you hate most should be the levels you try most (except you hate them for their boringness).
I don't hate any particular level in the pack, I just think it's unnecessary to have so many ultra-difficult levels in one place. Maybe if each level was spread out over a number of packs as the 7th - 10th levels it would be better, but having so many tricks and glitches crammed into a single pack can be a little daunting. And somehow I doubt you'll be able to keep the pace over future levelpacks.
But I don't know; maybe it's just your style. I think you certainly have the most talked about pack on this thread!
It inspires me to want to return to my LemEditing days.
You have a second pack? When's it coming out?