In Alberta we wear 2 different styles of shirts depending on the level of ball we do. We in fact have a "grey" shirt that is worn for high school and below. For college and University we'll wear the stripes. Personally I like the stripes; I find the material allows you to stay cooler when you are on the floor.
check out the link to see a couple of pictures of the shirt...
http://www.telusplanet.net/public/ripian/photo.htm