I wouldn't class myself as a step parent as my partner and I aren't married. But, his daughter does spend a lot of time at my house and we get on great. I've always treated her as a friend and we gang up against her dad!!
I love watching most sport to be honest, although I can live without football, snooker and darts (the latter two I also do not consider to be sport).
My favourites though are triathlon (loved watching the ITU world series and any Ironman coverage) and down hill skiing. The ski cross and board cross is up there too - the only thing missing from that is a paintball gun for each competitor.....!