Wearing airline-pilot style clothes strikes me as just silly, except maybe the African reason.
But a flight-suit... I agree with all Genghis says. Lots of zippable pockets in handy places, very handy when flying aerobatics. Doesn't matter if it gets oil/grease/dirt on it, if you have to squirm around under a wing trying to find a fuel drain or whatever.
I wear mine always for aerobatics. All the acro instructors I know wear one. For flying the 182... not really necessary.
Though it did once lead to an interesting conversation. Long story, I ended up having to take public transport home (a nightmare here) after an AOG incident with my plane following a flight in the Pitts. After 4 hours I finally got to my home town, and stopped to buy an ice cream. The oldish guy who owns the place said "Oh, you're a pilot"... and proceeded to tell me all about his time as an Instructor Pilot in the Iranian Air Force. I asked, did you ever fly in combat? "Oh yes, I shoot down many Iraqi planes".
And now he runs an ice-cream shop in Mountain View. Funny thing, destiny.