50 Cent/G-Unit - 50 isn't that bad. I like his hooks sometimes and he gets great beats and can sometimes drop a good verse.
Cam'ron/Dipset - Hate this shit. Just not my thing to hear about of idiots yelling and rhyming with stupid ass rhyme schemes.
Jay-Z - I've always liked Jay, ever since I got Reasonable Doubt. Used to be my favorite MC, now he's just someone who I can listen to every once in a while.
Kanye West - Fuck Kanye. Makes catchy music but he is such an asshole.