My 2 cents...
Teles are beautiful guitars. Like others have said: simplicity is the source of this beauty.
I have to say though, I dont like variations on the original design. Different pickup configurations, different bridges and rosewood fretboards all take something away it IMO.
Also, like I have said in the other thread, ugly for me is those disgusting, big, angular things like B.C. Rich, Washburn Dimebags, Gibson Explorers and the like.