Of what I own, Sideshow Halloween Michael Myers, that's #1. I bought it about six months ago on eBay for a $50 BiN. Didn't give it much thought or research, just bought it. Looks quite crappy and sits now on a bottom shelf, towards the back. I might sell it one day. I like old Sideshow figures, simple paints and doll-like appearances, I like Mego, I like things that look off, but somehow that Myers figure for me still comes off as plain crap, nothing lovable about it.
There's also the normal HT Michael Jackson Thriller. That sits on the bottom shelf too. I hate the head on it. I'm pretty happy to keep that though, don't think I'll ever sell.
The HT Bruce Lee suit figure was strangely disappointing too. I don't know why - it looked great in the photos, it was cheap to buy, but then I get it in hand and it's just somehow meh... Other than that though, I'm happy with everything else I own.