American Funds - Retirement Advice

I'm being offered a menu of American Funds from my employer for my retirement matching. I have a decent amount of experience (for a layman) in stocks and mutual funds for short to medium term investing, but I feel like I'm wading into uncharted water with this. I'm in my mid 20's, short term bear, mid to long term bull with an above average, though by no means extreme or excessive, appetite for risk.

Basically, I'm interested in any help, whether that be in the form of information from those familiar with the fund family, or just tips on what I should be looking for with funds of this type for this purpose.