Armchair Critic

Busybody

Cheapskate

Couch Potato

Down-To-Earth

Behind The Times

Go-Getter

Goody-Goody / Goody Two Shoes

Know-It-All

Man Of His Word / Woman Of Her Word

Mover And Shaker

Slimeball

Social Butterfly

Wet Blanket / Party Pooper / Killjoy

Worrywart

Pain in the neck

A people person

Party animal

Early bird

Larger than life

Wimp

Daydreamer

Laid-back

Have a screw loose

Rough diamond/Diamond in the rough

Dark horse

Lone wolf