One or Two Person Hammock?
One or two person hammock? Seems like a perfectly innocuous question. However the answer is not so much one or two persons, but what kind of individual will be using it, and what they're using it for.
The simple answer is: Hammocks aren't really for two people to sleep in.
Buy a 1 person hammock if ultimate lightness is your goal; if it's for a youth / child; small adult; or if you just intend on using it as a day chair etc.
If you're an adult, and you intend to sleep overnight in it; buy the two person hammock. It'll be a lot more comfortable.