adult males and females are about the same size but males have bigger/broader heads. personality is about the same also with the exception of what is referred to as a "hot" female. this refers to a leo that was incubated at a borderline temperature or at a temperature that normally produce males but for whatever reason the gecko turned out female. these females tend to be fiesty! i'm not really sure how common those are though, so i wouldn't base my decision on what sex to get on that.

if you think you might want to get more leos in the future you might get a female since males can't live together and if you house them with a female they will breed.

here is a link with some photos and descriptions of the different leo morphs: http://www.vmsherp.com/LCLeopardNames.htm