Depends on what you're going to do while wearing the shoes.
I had a pair of the retros which lasted me 4 months earlier this year (developed a rip after gym, threadmill, outdoor runs, ball, work...I damn near used it for every activity you can think of)
if you're going to do anything high intensity like playing ball (especially when you like "cutting"), wearing socks may actually cause some slippage inside the shoe. Yeah, it was dumb of me using it for ball but I thought it would hold up well enough like Jordan Trunners do.
Else, if you're going to use it for walking,etc then sockless is OK. I can't imagine the stank on those shoes if you have sweaty feet though.