In order of preference: Pagea, Continents, Archipelago. My reasoning: I like the diplomatic environment of pangea... generally you're going to have contact with everyone much earlier. Wars/fighting/trading happen sooner, and more often (IMO). Secondly, I'm not a huge fan of naval operations. In fact, I rarely build any boats beyond 3 or 4 Curraghs/Galleys. Finally, and especially with Archipelago, corruption can be a real bugger. It almost requires a communist gov't. I do, however, plan on tackling an archipelago map one of these days.
-V