Ugh, slapstick
Honestly though, I'll sit down and watch almost anything from 1905 - 1940 in a heartbeat. Very little that I don't just absolutely love from those years - and that spans all genres of movies.
By the 50's to 60's I start to get a little more selective in my tastes. While there are certainly good movies from the 70's, it just wasn't my era. 80's (when I was born) movies are as varied as they are today, but there was a lot that I enjoy from there. Early 90's were good too. By the time you reach the last 18ish years there hasn't been what I've felt are spectacular story telling movies.
Great actors are secondary to me, and I think the industry cares too much about the cinematic spectacular these days. A good, solid, well told story is just so much harder to find (not impossible. They DO still make good films, but story as an art in movies seems to be slipping).
Obviously that's all VERY generic and unfair to break up or categorize movies by year of release, but it's -generally- how I feel. (That is, "year" is never a determining factor in my choice to watch a movie or feel any level of enjoyment towards it.)