Likes ...
Dessert (Desert is a word)
Hiss (His)
Hopping (Hoping)
Posse (Pose)

Supper (Super)
Tapped (Taped)
Weed (Wed)
Holly (Holy)

Teen (Ten)
Whoop (Whop)
Dinner (Diner)
Filling (Filing)

Furry (Fury)
Mopping (Moping)

But Dislikes ...
Carrots (Carots is NOT a word)
Chatter
Looking
Crook

Snack
Razzle Dazzle
Street
Grass

Sissy
Wallow
Lunch
Baggage

Pillow
Swimming

My friend likes words that have double letters, so that when you take away one of the double letters, a new word is formed.