When I started having to wear suits to work in the early 90s, most of my early suits were DB.
Today I have 14 jackets (suits and sport coats), all SB. Not because I do not like the look of DB suits, actually, I find that DB suits look great and as I am tall and quite slim with an athletic build, they actually look good on me. But I do not find them practical: I often walk with the jacket unbuttoned (which I know I shouldn't), and it looks so wrong with a DB suit.
(I know that practicality is not a major argument and that if you take it to the extreme you will end up wearing horrible ergonomic shoes; I am not taking it that far. But when I have to wear a suit the whole day, I know that I will end up with the jacket unbuttoned, and I hate the idea of doing it to a DB suit)
(Still, every time I talk to my tailor about bespeaking a suit, I think that it would be nice to have at least on DB suit; but then I think about how I will use it, and end up with an SB one.)