Ok but Will doesn’t even wear plaid that often. He wears a lot of Chambray-ish shirts, henleys, sleeveless vests, blazers, pullover sweaters, and a variety of jackets. He wears a lot solids and mix & matches his wardrobe constantly. What REALLY stands out is that everything he wears aside from his button ups and sweaters are stained. Fresh stains as well as permanent stains that can’t be washed away, which makes me deduce (twisting my fake moustache here) that he classifies his clothes into 3 categories;

1. Professional clothes (plaid & solid shirts, ties, blazers – unstained)

2. Bedtime clothes (old, too-worn, holey t-shirts and boxers)

3. Hobby attire / Casual clothing (literally everything else in his wardrobe that he doesn’t go to work in – henleys, vests, fisherman tops – all stained with grease or something else. ++ Lots of sweaters/fuzzy tops which are kept with relative care)

And!! He visits Hannibal a couple times in his hobby clothes outside of work. Which makes me think this is his favoured state of dress.

In fact!! He vamps up his wardrobe in s2 to hide away his personality, offering Hannibal a battle-ready armour instead. He has stored away all vulnerabilities that Hannibal can take advantage of.