I’m not a huge sci-fi fan, I find many sci-fi films shallow and overrated. I hate it when they pretend their wafer thin plots are deep, meaningful philosophies. The matrix is probably the worst for this, but I feel the same about some of the most highly regarded movies. I’m not going to mention them as it usually makes people unaccountably angry.
Having said that there are many that I have really enjoyed ever since I was tiny – The Day the Earth Stood Still, Forbidden Planet, The Time Machine, Logan’s Run, Westworld.
A bit more recently I like Back to the Future, Robocop, Twelve Monkeys. does Being John Malkovich count?
I haven’t seen anything I’ve really enjoyed for years – I thought Minority Report was good, but that was two decades ago.