I placed "best" in quotes because I know it's kind of a subjective term, but what I'm looking for is the most stable, polished, well implemented survival mod that requires your character to eat/sleep/drink. It must be compatible with FCOM, OOO, MMM, etc.
So far I've found Basic Primary Needs. I haven't tried it yet but it seems to be very good from what I've read in the description. Well thought out and implemented.
Anyone else have any input?