My tastes are eclectic .
There are a lot of movies I like from 70s and 80s (and the 90s) . Some would qualify as works of art, some as entertaining time wasters or tear jerkers or even utter crap (due to script, acting, production values, etc ).
My favorite sub-genre is actually late 70s to mid 80s (mainly Italian) produced exploitation films (horror, sci-fi, post-apocalyptic, etc ), which would mostly qualify as well assumed guilty pleasures . I like Roger Corman and John Hugues movies too. I also appreciate more mainstream classics like Taxi Driver, Blade Runner, Tron, Dune, Driving Miss Daisy, Dead Poets Society, Evil Dead, Cinema Paradiso, Videodrome and lots of others, in no particular order (though Cinema Paradiso and star Trek II hold a special place in my heart).
I tend to find fewer newer films to be to my liking, but some are really good too. IMHO, this is generally a good thing as it reduces my need to buy more movies (I already have most of what I want).
Movies can be enjoyed on many levels, just like music . Captain Beefheart, Beethoven, the Beatles, Tangerine Dream, Iron Maiden, The Spice Girls and Tiny Tim, for example, can all be appreciated (or despised) by a given person for altogether different reasons .
Maybe there's even someone who likes the works of both Uwe Boll and Akira Kurosawa (OK, maybe that's a stretch)?
Just my two cents of an opinion .