Its my favorite decade for comics, and I feel that I've missed out on a lot of great 80s runs, mostly from DC.
For Marvel I read Daredevil Born Again, from Frank Miller, which I thought was as good if not better than his original DD run.
Read the first 20 issues or so of the 80s Justice League International. Thought it was really entertaining, enjoyed it.
Currently reading Doom Patrol, just got to issue #19, when Grant Morrison took over.
Next will be Booster Gold's series, hopefully will get through the first 20 issues or so.
After that will be New Teen Titans from 1980, which I hear is fantastic.