I loved "Hard Boiled" great movie that ages well. Japanese movies have a strange pacing to them IMO, some of their horror movies are like this, I think with the subtitles and cultural oddities I tend to lose interst too easy. Loved "Shogun Assassin," but again that seems to be cuz it's like 7 movies splicing all the good parts together.
After all the Bruce Lee, Jet Lin and Jackie Chan (and the Master of the Flying Guilotine--best old school movie IMO) movies some of my favorites from 80's and 90's were: King of the Kickboxers (under rated one of the best), The Perfect Weapon, all Chuck Norris flix, Blood Fist 1 & 2, Bloodsport and Kickboxer, Above the Law, Marked for Death, Hard to Kill, are the ones I remember most. Modern I love Ip Man, Ong Bak, and Black Dynamite and Kill Bill 1 & 2.
However, the Raid 2 is so superior to all these in terms of action, real skill, little CGI, and mind blowing violence it's in it's own category. Can't recommend it enough, actually rewatched it to make sure it was as good as I thought but it's actually better :-)