BBT seemed to say "Let's tell a fake and myopic story" but then sometimes gave me moments of sincerity that were a pleasant surprise.

Modern Family seemd to say "We are a sincere and progressive show" but then often felt fake and myopic.

I still prefer Modern Family, by a long shot, but I often felt underwhelemed - while with BBT, I expected nothing and then was pleasantly surprised from time to time.

I think BBT will age well in the way "Three's Company" aged well: it is sexist trash, but many things about it worked surprisingly well or were better than they had to be.