Efour, you actually list some of my main ones.
Pro Football -- A lot of money involved here and just don't understand the fascination with it. Find it generally boring to watch. Also a lot of violence surrounding it.
Flashy wrist watches -- It tells the time, why does it have to cost so much. Suppose it could just be labelled as jewellery, just for showing off purposes? Not for me, I'm far from vain.
Expensive restaurants -- I've had some great food and service from cheap and average restaurants. Don't understand the fascination with expensive restaurants, especially when you get to the point where you have to book well in advance.
Weddings -- Expensive day which i don't feel is important really. I'm all for having a day to "tie-the-knot" but why do people spend so much money on it?
Pop music -- 95% manufactured samey-crud churned out for the masses with a catchy tune. It's not really music for me, it lacks emotion, quality and talent.