I like some Linkin Park. It's just that the people I've seen in the fanbase have made their songs seem extremely shallow (I'm not saying that they are, just that they currently feel like it) by applying the rather melodramatic lyrics to relatively mild teenage annoyances or using them in AMVs for somewhat emo anime characters over and over. Even if "Crawling" was brilliant, its overuse by angsty teens and preteens has ruined it for me.
As for Nickelback, I don't like them purely because they're so generic and bland that I can't feel ANYTHING from them. Their music isn't bad, but it's so standard and formulaic as to be utterly soulless.