My least favorites are:
A Song For The Sleeping (Just terrible stuff. The riff is awful.)
Pretty Penny (For some reason it just bores me. I don't think it measures up to anything else on Purple at all)
No Way Out (It's just a generic rock song that the band has done better on several occasions.)
Wet My Bed (Not really a song, but it's still pointless of having it be on Core. It doesn't show any dimensions for the band, it simply shows they wanted to add filler.)
Some other stuff on Shang is a tough listen for me. I really have to be in the mood for some of that stuff, and I never ever am.
Oh, and for the record, I like songs like Pruno and Dumb Love. The bridge in DL is really good.
~Jeremy~