Turns out, “Gilligan’s Island” wasn’t as simple as we thought it was:

Sherwood Schwartz, the creator of Gilligan’s Island, said he patterned the ‘seven stranded castaways’ after the seven deadly sins but he didn’t admit it until years later in his book about the show.

I’m sure you can attribute the sins to the proper characters but here they are:
The Professor – Pride
Thurston Howell III – Greed
Ginger – Lust
Mary Ann – Envy (of Ginger’s looks)
Mrs. Lovey Howell – Gluttony
The Skipper – Anger or wrath
 Gilligan – Sloth

All together now, let’s sing the theme song: