I've been searching for a messenger-style bag, and having a difficult time finding a good one.  The biggest issues I found with most bags were 1) most looked too much like a purse, and 2) many were quite pricey.

Found this one here on Amazon, and I'm mostly happy with it.  It fits my criteria better than any others I've seen.  Price is reasonable, and it doesn't look like a lady's purse.  The only thing preventing me from giving it a five star rating is a lack of zippers (or way to secure) the pockets.  The two outside storage areas are just kind of open.  But, overall this is a good buy for a dude looking for a generic bag.