Anyone watch Rifftrax? Basically it's Mike, Kevin and Bill mocking more modern movies. You buy their commentary for a few bucks and sync it with a movie you already have (actually selling DVDs with commentary requires permission and payments and assorted bullshit). Particularly enjoyed 300 and I Am Legend.
Watched their Reefer Madness live show on Hulu. That was funny as hell. Also their House on Haunted Hill with Richard Price, Burn Victim.
Oh, the worst MST3K movie I Think I've seen is The Castle of Fu Manchu. That shit was entirely unwatchable. It was just like suffering even with the riffing. The crew seemed to have as bad a time with it even.
My favorite from the Joel Era is Fugitive ALien 2 (They tried to kill him with a forklift!) and favorite from Mike is Invasion of the Neptune Men (They bombed the hitler building!)