I'd rather wear a speedo than trunks or board shorts. I have nothing against trunks or board shorts, but given the preference I just enjoy wearing tight clothing more than loose. As far as wearing the opposite sex's bathing suit, if it's just between one-piece and two-piece, I'd wear a two-piece, but I don't have any problems with wearing any swimsuit for the opposite sex. I have a bunch of fun monokinis even that kind of help blur the line between one-piece and two-piece. I've included a picture of me in a two-piece just for the heck of it (well, to be honest, to get the extra points from including a picture).