I have to defend tie bars, since I do occasionally wear them, but only when I feel they'll give an outfit an unexpected lift. They can be very impressive, especially if they have some historical aspect. Likewise with other little pieces of jewelry, such as collar bars and lapel pins (which are higher on my list of favorites), I like the drama and sense of individuality, but I avoid wearing them every day. However, I feel that most men I see with tie bars fail to carry them off; they look awkward and sometimes untidy, and I have to resist asking if the tie bar came with a matching tie and hanky set. In short, if you can carry it off, then do it and enjoy it, but I would never recommend them as something that's automatically going to make you look better dressed.