Посмотрите пожалуйста, может ошибки в грамматике или в построении предложений есть? 
_____
For me always was interested in winter sports, snowboarding. I consider him to be an extreme sport. This sport is the descent from the snow-covered slopes and mountains on  - snowboard. For the first time at the Olympics snowboarding appeared in 1998. Of the varieties of snowboarding most interesting to me slopestyle, consisting of performing a series of acrobatic jumps on trampolines. I think that snowboarding is a very interesting sport.
_____