I Have A Friend Who Likes ...
DELIA
DENNIS
DON
EMIL

EVAN
MARK
MIA
PAM

PAT
RON
But Dislikes ...
DAVE
CARL
BETTY
JAMES

CARRIE
KATHERINE
STEWART
JACKSON

BENJAMIN
ROBBIE
My friend likes words with the following characteristic:

They all have names that are also common words spelled backwards.
For example, DELIA > AILED;   DENNIS > SINNED;   DON > NOD;   ...