I am not a fan of the whole "Children of Hurin" part of the canon. It's just unremittingly dark and depressing. I love the rest of the Sil and Unfinished Tales though. Really, I can't think of anything else I have a particularly negative reaction to. Not even Tom Bombadil, whose character is fascinating, though I agree with those who suggest the "ring a dol dillo" stuff gets very annoying after a (short) while.
Galadhloth, Hunter 100, Glirithil, Mini 100, Calanor, LM 100, plus lots and lots of alts
Watchers of Elendil ~ Landroval ~ Crickhollow ~ Tarciryan Knights
~~~~ Imladris in the Forgotten West ~~~~