I don't really care if they are older or younger. I supose anyone over three years younger then me I wouldn't date, and anyone more then five years older then me I wouldn't date.
Most of girls prefer older guys because of their experiences and maturity of course.
However, I personally prefer younger. I can be me with a guy who's younger than me. I'm witty and a dreamer too. :)
Anyway, it doesn't matter whether you are with older or younger guy, the important thing is getting along with someone, finding your soul mate. ;)