I prefer huge maps, the bigger the better, like others. BUT, this is assuming 2 things: memory errors are not present, and that the land is unique and full of things to do. If memory errors are an issue, and if the world is empty, I'd just as soon choose a tiny map to get the game over with fast.
In general though, I prefer that epic feel over a smaller "island battle." To put it into shooter terms, I prefer the maps in Battlefield and BF: Bad Company 2 vs Call of Duty (epic vs meh).