I apologise for breaking up the Sub Terra discussion as what I'm going to post is unrelated to it
(Sorry!)
Anyway, I must admit that I don't think Nemesis is the best coaster on park. Sure it's a great ride but out of the 3 B&Ms, it's now probably my least favourite. Having rode it and Air on Saturday, I'll admit I seemed to enjoyed Air more. I think it's on par with Smiler in my view.
As others have mentioned, I like stuff such as Sonic Spinball and Th13teen and think they're great family coasters. I also like Rita and don't think the actual ride is bad.
And I must also admit, I like Duel WITH the guns. I don't know what it is but everytime I've been on it I've always used them. Although I would have love to have ridden the original Haunted House.