It would be a bit easier to recommend horror movies if you said what you like best in a horror movie. For example, practical effects, tall dark and spooky bad guys, psychological horror, ghost movies, slashers, horror comedy, really low budget, etc.
Anyway, me and my sister love horror movies (used to be afraid as teens but then when we became college age, we ended up watching so many horror movies we stopped counting when we hit 200ish like... 5ish years ago).
If it's classic horror movies you're watching lately, I really recommend watching the movies with big horror characters related to them. "A Nightmare on Elm Street" film series for Freddy Krueger (DON'T watch the 2010 remake, it's stupid) [practical effects, charismatic villain, supernatural],
"Hellraiser" for Pinhead (I only recommend the first 2 movies, after them the characters change and it gets weird, the first 2 movies actually have two sets of villains so it's interesting (the Cenobites on one side, bad family on the other) [practical effects, supernatural].
Both the new and old version of "Fright Night" are good [good mix of comedy + young people fighting the supernatural].
(Remake has a slightly modernized plot, like the TV host guy from the original is now a performer like... Criss Angel.)
Anyway, those were just a couple big name horror movie recommendations that most horror buffs end up watching. If you have a preferred horror type mentioned on the first paragraph, please let us know.
Edit: Added trailers because why not?