This week's web tip on writing great characters (main or secondary, male or female) comes from the Writers Digest web site.
Writer Leigh Anne Jasheway begins by looking at the ways that male and female novelists approach their characters and topics. She then moves into looking at male and female audiences (romance novels? sports exposes?) and examines what men are looking for in a "good read" versus what appeals primarily to women.
Everything from how one approaches a topic to how one dresses a character is on the table in Jasheway's discussion. Have a look?