I have a recurve that seldom gets shot (my bowfishing bow) and seldom gets unstrung. I've had it at least 5 or 6 years, it's doing fine--it's been strung up a lot more that it's been unstrung this past year--honestly don't remember if it's even been unstrung this past year. I unstring my longbow when I want to put it in a sock to travel--been shooting it for ten or twelve years, it's still going strong. I don't think it will make a difference as long as you store it properly. I can think of one negative to leaving it strung--if your string were to break, that wouldn't be good.

Chad