I like one PC, but I like having men-at-arms or henchmen, too. So one PC + NPCs, rather than multiple PCs. The difference being I can give commands/suggestions to the NPCs, but there's no guarantee that they'll follow them all the time (makes high Cha very useful, too).
As a DM, I always recommend NPCs, especially for low-level parties. I don't let players abuse the NPCs, though -- doing that is a fast-track to having a "mutiny" on your hands (of course, high-level and evil PCs might get away with it). The NPCs often become beloved characters, and are also a source for new PCs that don't disrupt verisimilitude in the case of PC death, new players joining, et cetera.