(for girls) Age Difference
I would have 2 or 3 years as a limit. Not that I can imagine any guy 3 years older than me wanting to go out with me, I'm a bit immature, but hey. My brother is 3 years younger than me and it would be a bit sick to go out with anyone younger than my brother, and I feel I should have the same upper limit as lower limit. Certainly anyone within a year of my age is fair game though. I'm 21.
Yeah, it's silly to have age limits of only months. Who really goes, "ohh your 5 months older than me, that's too wierd". I don't know anyone in there right mind narrows down their dating choices that close to their age (months).