Personal favorite, anything that Rivers Cuomo awkwardly pulls off.

Plus, Mr. Rogers would totally approve of a Lacoste sweater.

PS. I always liked this yellow sweater on Mr. Rogers. It reminded me of the kind of sunshine he radiated when he walked through the door.
Helpful sweater-related blogs:
The Argyle Blog
Ugly Christmas sweater party
Sweater Babe (not entirely dedicated to sweaters, but you get the point)
Do you have a favorite sweater you'd love to talk about? Share a love of another Rogers' worn sweater? Comment!