Which means name characters who were mean to each other when they really liked each other

Lois Lane & Clark Kent - Smallville http://i197.photobucket.com/albums/aa303/chely_welling/smallville/bannerclois9ef.jpg

Liam Court & Ivy Sullivan - 90210 http://3.bp.blogspot.com/_0UrSSDnmScw/St9Ldwg-FFI/AAAAAAAAAss/7z5dQkl_eZc/s320/90210-Liam-Ivy.jpg

Niles The Butler & C.C. Babcock - The Nanny http://img.photobucket.com/albums/v668/christinuviel/avs/ccnilesbase2copy.jpg

Maxine & Kyle - Living Single

they werent a romantic couple..but Archie and Mike on AITF ended up liking each other...and of course the most popular of all time in sitcom history..from Comrades in Arms....Hawkeye and Margaret...on M*A*S*H*

The only one that comes to my mind right now is Maddie Hayes and David Addison from Moonlighting.