Worst made? One of the standard go-to's, I suppose: Plan 9, Birdemic, Troll 2, or The Room. There's a zombie fick called "Flesheater" I have that is also pretty terrible. Hand held cameras (the home-video kind) and weekend actors.
One I hated most? Terminator Salvation.
Terminator 1 & 2 were some of the most perfect Sci-Fi/Action pieces in existence, T3 was lesser but harmless... how did you guys fuck this up so bad?
Tell me when and where in a post-apocalyptic, war-ravaged, killer-machine-infested, bleak and hopeless wasteland would a woman find the time or motivation to keep her teeth sparkling white... tell me, dammit! You can't, cuz it's beyond stupid. Oh, and CGI Arnold.... CGI anything is bad enough... but an actual human being?... in a live action movie?... awe fuck. And that stupid bro-nod at the end. And Christian Bale being all "I know what you are." (then at the end of the same scene) "WHAT ARE YOU?!?!?!?!". The shitty remix of the original theme in the opening credits. And the whole time, the whole time (!!!), boooooooooring. The final insult: they dedicate the thing to Stan Winston - might as well shit on his grave while you're at it, hopefully his spinning sends a few chunks back your way.
I'm still disappointed in myself for not walking out on that one, then asking for my money back, then punching everyone who worked at the theatre for supporting the system, then lighting fire to said theatre, and then scooping my own eyes out and tossing them into a volcano. Damn this curiosity.