Well, you're not going to like my taste. JASON X and JASON GOES TO HELL were my favorites, because they actually did something different.

In the HELL movie, Jason jumps from body to body, killing scores of people. It reminded me of one of my favorite movies, THE HIDDEN!
In JASON X, I liked what they did, from using David Cronenberg, to shattering a frozen women's head, to the female android, to Jason android. What a hoot!
To be completely honest, except for Tom Savini's makeup FX, Mrs. Vorhees, and the shock ending of the first FRIDAY THE 13TH (1980), it was hard for me to get into this series. Parts 2 and 3 are terrible, IMO. I never bothered with IV, even though Savini came back. (I've seen Jason slide down the knife, and the end scenes with Corey Feldman. Looks decent enough.) I've always like "monster horror," so I did like FRIDAY THE 13TH PART VI: JASON LIVES, because he was more of a terminator/monster than a deformed man with a knife.
Movies like ALIEN, TERMINATOR, CREEPSHOW, NEAR DARK, THE THING, PREDATOR are more up my alley. The parts I like about most slasher movies are the thriller, chase, mystery parts. If those are done well, I like it.. I don't care about kills just for kills sake. Jason movies were a lot about kills for kills sake. Part 1 had FX that people hadn't really seen before (I'm looking at your neck, Kevin Bacon!!). I don't really care about parts 2, 3, 5, 7, 8, and didn't see 4. If they did something different - 6, 9, & 10, I liked them. I was so so about FREDDY VS JASON. Some humorous parts, but Jason is a stick in the mud, most of the time.
I did like the first 4 HALLOWEEN movies, but at least you could root for Jamie Lee Curtis and Donald Pleasance. "He's the devil." Dr. Loomis' character elevates Michael in a way that Jason isn't. Michael's voyeuristic POV shots, along with Carpenter's music really elevated the experience for me.