from the bsi point of view: i used to work for an agency that shall remain nameless and i was given grief for wearing bsi! the population we served was primarily lower income, drug & alcohol usage pretty rampant, and lots on non-english speaking field workers and yet on 95% of the calls my fto and his medic never wore gloves!
my feeling is that you never know what "cooties" are out there and i don't want what my pt has nor do i want to pass anything i have onto them - now that being said i must admit that we rarely wear eye protection or masks and that may be our downfall someday.
i agree that complacency can keep us from being excellent - i had a medic tell me once that when you get to the point where you "know what you're doing that's when you screw up"
kate