Here are the minifigs from my absolute favorite themes: Space Police I, Blacktron I (I know the walker is Blacktron I… I’m torn over it, but I have two of them and I prefer their ships and 6987 Message Intercept Base), Imperial Guards, Imperial Soldiers (the original, and more superior version of, the Imperial Guard 😉 ), Crusaders, and Black Falcons. I like other castle themes (such as the Robinhood-esque Forestmen and Wolf Pack) and I enjoy other classic space (Futuron), although I’m trying to stay out of the Unitron/Space Police II for now.
I forgot to mention: I’m not sure what instructions books I have. I’ll check when I get a chance. (Sorry for not mentioning this earlier, but normally just buy sets with or without and build off Peeron)
I have two of the walkers so I’ll set one aside for Rich. I may also have another Aerial Intruder and Sub Orbital Guardian, but I’m not sure. (I’ve bought a few lots and I’ve barely inventoried… I need to get on that!)