I see noproblem with any age discrepancy really. My sister is dating a man over twice her age and I'd date someone half mine (or possibly twice mine) if said person shared enough interestes and was genuinely "loveable" (with everything that entails) enough.
The one big probem with dating outside your own "age" is that you lack a LOT of common ground and LOT of experiences that may turn into a problem for you and your partner.
Consider this:
Thinking back five years in your life, were you as wise, smart, understanding etc. as you are now? Wouldn't you say that you've changed (mentally at least) for the better in the last five years? If you answer yes to this, imagine dating someone who is 10+ years older/younger than you. There is a wealth of understanding, knowledge and general emotional maturity that the older person has on the younger one, plus there is a generational gap in upbringing and culture so the chances of you being a good fit for your partner lessen the more years you have between you.
But in the end, just go with what feel right at the moment. Nobodys stopping you, just don't be surrised if it doesn't work out the way you planned it
