Love brain films - Donovan’s Brain was good, so was Brain From Planet Arous.
Two great films that for some reason are little known in the States: Quatermass and the Pit (AKA Five Million Years to Earth) and Day of the Triffids.
And lest we forget all the giant critter films, how about Them! (best of them all), The Giant Gila Monster, Attack of the Crab Monsters, Tarantula, Earth vs. the Spider, The Deadly Mantis, Attack of the Giant Leeches, Night of the Lepus, The Monster That Challenged the World, Frogs...and so many more Creature Feature/Chiller Theater/Saturday afternoon bug-eyed monster delights....
LEPUS and FROGS were 70’s flick! It was in that dreadful decade B-movies lost their innocence and charm.
The T&A and left-wing messages(Piranna, Barracuda, Humanoids From The Deep) took over entirely-- a nasty trend that continues to this day.