Are we talking about the same Doug here? I recall him constantly making up completely ridiculous scenarios in his head throughout each episode. He also created "superhero" personas of himself where he would beat up all the evil bad guys (Roger) and save the day with Patty Mayonnaise becoming his bride or something. Sounds pretty Ne to me.
I literally just had a fb chat with one of my friends about all the old cartoons that we hated "back in the day" but missed when they went off the air. Yes, Doug was one of those shows (we're converts ).
I haven't watched the show in ages, but in my hazy recollection of it and its characters I'm thinking Doug is an Introverted Feeler of some sort. Which goes perfectly with the Extraverted Perceiver sidekick best friend, Skeeter.
I have no idea what type the girl, his love interest (Patti?), was. Not much characterization there to make an impact.
I think one of the main reasons why that show was so cool was because all the people in it were "colored." That was pretty wacky, but it seemed so normal back then.