I hated Biuckaroo Bonzai (boring to me) and Fifth Element (all style no substance but good music). Johnny Pneumonic? Yuck..! I thought it was a mess of a film. Although I *love* Dena Meyer. Always a babe.

Primer
Sunshine

Can't go wrong there.

sunshine was a good one

Bicentennial man is quite good

Cargo - http://www.imdb.com/title/tt0381940/

Good time travel films:

Time After Time, though there's not really much scifi beyond the initial time travel. The Time Machine (1960 version). Time Bandits. The Final Countdown.

Good computers in control or taking control films:

Forbin Project, Demon Seed, Logan's Run (worth watching anyway, for Jenny Agutter). I used to love Westworld, but I saw it again recently and found it unbearably slow. The premise is great though, so it could stand to be remade.

Enjoyable weird/low-budget/cult films (if you're in the right mood):

Dark Star, Night of the Comet, Terrorvision.

All of the above are pretty old - 70s/80s - since the OP has probably seen most/all new recent films.

Timecop and The Faculty are two enjoyable 90s films. Of the last decade, Idiocracy is great, Aeon Flux gets a hard time from comic-book guys at IMDB but it's not bad, Surrogates is pretty good, and another 'avatar' related movie, Gamer, which I expected to be terrible, is mindlessly enjoyable.

Some good suggestions in this thread, and some I haven't seen that I'm going to check out.

However a lot of people were just unhappy because of the dumb, annoying characters behaving stupidly and/or unprofessionally (ie, unrealistically), the parts of the movie that went nowhere, or made no sense or weren't explained, and the pointless use of Guy Pearce, with the worst make-up effects of any movie in history.

People had very high expectations, and it was a big let down.

I liked johnny mnemonic, but I'm a fan of William Gibson.

might try Priest

What a tearjerker. ugh.

Both good. "Somewhere in Time" with Christopher Reeve is good too. Less Sci-fi and more mush though, it's still excellent, and Richard Matheson wrote the screenplay based on his book.

Forbin project is one of my all-time favourite classic movies. Great story, great acting, really cool computer. I think I was 5 years old when I saw it and this movie got me hooked (and terrified) of computers.

Logans Run! Loved this one too. Saw it 14 times. The effects are cheesy by today's standards but it doesn't really matter and somehow makes the movie even better.

I forgot about outland. very good call. Sean Connery at his best. If you want to see an old classic scifi which I think influenced a lot of films over the years including star trek. Forbidden Planet. A more recent film I always enjoyed was Serenity. If you want a lighter comedy type a sleeper is 1999 Galaxy Quest. not bad starting Tim Allen.

Another good one. If you want alien invasion sci-fi Monsters. low budget think the budget was 17k but the FX are good. I watched it again recently and enjoyed it just as much the second time. They adlib so the acting is a little off. But I found the story compelling. Reporter is given the job to bring his bosses daughter back to the US after aliens invade Mexico.

+1 Lockout

Yeah, Forbin Project is excellent, with intelligent characters and themes. I love older films about, or that depict, early computers or technology. I think Tron is actually pretty good in that respect too, perhaps due to the involvement of Alan Kay.

I agree. Even aside from the effects, it's a very 70s looking film, but that's part of its charm, and the style seems to suit the 'idyllic', hedonistic society where it's set.

Looper (2012) - In the Top 250 on IMDB
Chronicle (2012) - Great film for a $12,000,000 budget!
Source Code (2011)

It's very hard to get a good Sci-Fi film , so few of them are made :disgust

All those above are worth watching because they are excellent

that was pretty cool, good effects

How could I forget Zardoz.

+1 for Zardoz!

How about a good 80's sci fi the last starfighter