I like playing that bishop move as black, too, just in case white intends to play the Colle. Once white plays Bd3, black trades bishops. Note that black's center pawns are on the light squares and white's center pawns are on the dark squares, so trading light squared bishops favors black. Black ends up with a good bishop while white has a bad bishop.
--Fromper
I'm usually fine playing a Colle System as White, but I was thrown off after 1.d4 d5 2.Nf3 Bf5, shown in the diagram below.