1979-1984 = Basic/Expert D&D (started with the Holmes basic set) and AD&D. Some Runequest, Dragonquest, Star Frontiers, Traveller, Stormbringer, etc. as well.
1983-1988 = Some AD&D, but mainly Middle-Earth Roleplaying, Rolemaster, GURPS, and other stuff.
1988-1992 = Only spordic gaming, including Basic/Expert/RC D&D, and Rolemaster.
1993-1999 = Very little gaming (some RC D&D, some MERP).
1999-2000 = Short Rolemaster (RMSS) campaign, that fell apart after 6 sessions.
2001-2002 = First 3e D&D campaign. Lasted about one year (final year of grad school).
2004-2005 = Second 3e D&D campaign. Also lasted about one year. Sporadic 'one-shots' of other systems (e.g. Buffy).
2004- now = Castles and Crusades campaign, plus some WFRP 2e. (I am moving to Ireland soon, so who knows what future gaming will involve?)