Mordecai - Can be immature but also mature at times,love music,slacker,irresponsible.
Rigby - Lazy as hell,slacker,jerk at times,funny,physically weak,irresponsible.
Benson - Can explode at times.
Muscle Man - Sometimes a jerk,laughs at own jokes (xD)
High Five Ghost - (/)
Pops - Childish,weird,really happy and cherfully weird at times.
Skips - (/)
Thomas - Always calls mommy. xD

Margaret - Can be nice,doesn't know how to bake a pie. O_o
Eileen - Socially awkward,weird,insecure.
Starla - (/)
Audrey - Guilt tripping
Cloudy Jay (CJ) - (/)

Death - (/)

Mordecai: Smart but slacks off.
Benson: Irritated constantly.
High Five Fhost: Doesn't talk much.
Skips: Distant.
Eileen: Socially akward and insecure.

Mordecai - Smart
Rigby - Slacks off often
Benson - Easily ticked off
Muscle Man -Kinda a jerk at times
High Five Ghost - Anti-Social
Pops -Weird but funny at times
Skips -knows alot
Thomas -Momma's girl (xD)

Margaret -Nice
Eileen -Weird sense of humor
Starla -/
Audrey -/
Cloudy Jay (CJ) - good at video games

Death - /

Mordecai - hopeless romantic
Rigby - slacker
Benson - forgiving (he has given them a thousand chances)
Muscle Man - bad at jokes
High Five Ghost - (/)
Pops - easy to please
Skips - private
Thomas - (/)
Margaret - oblivious to romantic feelings
Eileen - awkward
Starla - (/)
 Audrey - (/)
Cloudy Jay (CJ) - (/)
Death - (/)

Mordecai-Always tries to help a friend in their time of need
Rigby-I may slack off sometimes
Benson-Forgiving (it's like Benson has given Mordy & Rigby plenty of chances)
Muscle Man-I kind of use his reoccurring joke,and I end up laughing at like him (if that made sense xD)
HFG-I usually speak when I'm spoken to.
Pops-Easygoing/Easy to Please
Skips-I know a lot :p
Thomas-(Nothing really comes to mind for him..)
Margaret-(Nothing comes to mind here..)
Eileen-Kind of socially awkward (at times xD)
Starla-(Nothing really..)
Audrey-(Don't really know much about her,so nothing yet)
Cloudy Jay (CJ)-(Same with Audrey only she's only been in part of one episode..)
Death-(Honestly,I'm not sure if anything in my personality is like him :p)