Reggae gets love from me, despite its association with douche bags, it's pretty solid. Black Uhuru and Steel Pulse are genuinely good.
Dub, though, dub's a tough one. I like most of the music that island has put out, but dub was always the toughest nut to crack. For a long time I couldn't escape the feeling that it was just ruining good songs. I got the Trojan Dub sets, vol 1 & 2, tried really hard to figure out what it was that made people like the Clash, Fugazi, and others found so great about it. I could see how some of the techniques were interesting and clever, but in and of itself, I couldn't find it that listenable. Perhaps its the fact that its club music and sitting in your room listening to it late at night isn't the best way for an American white boy to appreciate it. Augustus Pablo and the Upsetters I dig, though.