To the OP ....... I think there is a wide personal definition of 'utilty'. and that definition probably affects an individuals style choices (though my wife might question whether I have and style or not) My personal definition of utiliyt is: A bike I can hop on and make a quick trip to pickup some...food,groceries, medicine...what ever, a bike I can do a quick ride with my son (10 miles or so). A bike I can ride to work in khakis and polo. A bike I can clip in if I want or not if I don't. A bike with fenders, kick stand and lights. So the clothes I wear depend on what I am doing....generally what i have on or need to have on at my destination. I like lycra on longer rides and if I had a longer commte "lycra" would be utilitarian, in that is effcient and helps me do what i am doing, better, faster and more comfortably.

A bike trailer would not be utilitarian for me......because it is more than what I want to deal with....not that it would not be highly useful at times.

fyiw