Call me postmodern, but I love to hear an artist use a clever sample of someone else's song within their own. Or maybe I just like to feel smart when I can pick out the original song being sampled. Either way, here are some of my favorite songs that sample other songs...
"Train in Vain" by The Clash in Garbage's "Stupid Girl"
"Super Freak" by Rick James in MC Hammer's "U Can't Touch This"
One of my favorite rappers + one of my favorite Daft Punk songs = awesome. This is probably not one of my favorite Kanye songs, but I get excited when two very different genres can share the same space like this.
A favorite artist of mine whose music is largely made up of samples is Californian nerd-rapper MC Lars, who describes his sound as "post-punk laptop rap" (he tours with a laptop for a backup band and probably contstructs and deconstructs a lot of music on said laptop). I've heard him use everything from Iggy Pop to Brand New to Supergrass in his tunes.
Check out these two tracks, both from his The Laptop EP:
MP3: MC Lars - Hurricane Fresh (feat. "Rock You Like A Hurricane" by Scorpions)