Curious, for favourites, I'm looking more with regards to most enjoyed, not necssarily which you thought was best done(there is a difference if subtle). I'd like you to also factor in whole franchises or movie series, so don't feel you have to pick say Star Wars V, It’s okay to pick just Star Wars, even if you hate the Sequels unless one particularly stood out.
Also what would help is some comments about your choices, I'd like to know what you found enjoyable about them, and feel free to be as brief or comprehensive as you desire.
Frankly I'm looking for new material, and there are some films I've really enjoyed, but would never make my top 10 best, but they'd make my favourites also who knows maybe there's something good i've missed that i can watch.
Top 10 Sci-fi
Top 10 Fantasy
Please do 2 separate lists