Leo - Virgo

Sign Ruler Mode Element Polarity Aspect
Leo Sun Fixed Fire Positive Signs are semi-sextile (30o).  Aspect can range from near Conjunction (1o) to Sextile range (59o), depending on exact position of each Sun. 
Virgo Mercury Mutable Earth Negative

What you like about each other:  Leo showmanship, Virgo reserve. 

What drives you crazy:  Once this couple gets established and the Virgo nagging starts, trouble could be afoot.

Leo likes nice things, Virgo believes in doing things right, which somehow matches up.  Virgos are meticulous and usually come in nice packages, which works for Leo, particularly when they don't provide a lot of verbal competition.  Yet.  Virgos are hard workers and catch all those details that Leo usually doesn't want to be bothered with.  Leos work hard, also, but they don't like dealing with the small stuff.  They like to rule as king or queen of beasts, but let their minions take care of the minutia.  So in this respect, these two have a solid basis for being very compatible. 

Depending on other factors like our old friends the Moon and Ascendant signs, however, there could be a potential for major conflict.  If this particular Leo is the slightest bit on the lazy side or, heaven forbid, messy, then Virgo may hit the Nag Now button and all hell will break loose.  Leos don't take well to nagging much less criticism and Virgo is the sign that can dish this out in spades.  If they have a solid foundation of respect between them and have good communication skills (being in love with one another won't hurt, either) then this may not ever surface as a problem and if it does, can probably be quickly resolved. 

Best case, these two could build an empire together if so inclined.  With mutual love and respect they will continue to enjoy those traits that brought them together in the first place for the rest of their lives.