The workaholic. For the guy who makes work priority   number one, a relationship can seem like a hindrance for which he hasn’t the   time or energy. It’s likely that he’s set lofty career goals for himself — perhaps   finishing medical school, rising to make partner in his law firm or starting   his own business — with personal deadlines (say, by age 35).

The partier. For this guy, weekends in Vegas and   hitting up the newest parties and clubs has too much appeal to entertain the   possibility of settling down.

The shy guy. It’s a fact: Meeting women requires   conversation — which can be problematic for a shy guy and can stunt his relationship   prospects

The too-picky guy. For all his many, many first   dates, this guy is resolutely single, never having met anyone who quite fits   his mold for the ideal mate. He is convinced that there is someone out there   and is alternately determined to find The One or frustrated by his inability   to do so.

The none-of-the-above guy. Of course, there are   guys who might not fall into (just) one of these categories, who are comfortable   with themselves, outgoing and trying to meet someone to share their lives with   — but for whom it just hasn’t happened yet.