You are in the right section to know more about those casinos and sportsbook that you want to take a review. And you only need to go through each of the threads here in
Gambling. That's generous of you if you're making a review for free and the review must be made honestly because you didn't do it with pay.
And of course in which sport event do you like to bet on more?
I'm mostly following the e-sports and to be specific with Dota 2. There are a lot of sportsbook that have this game on their list and although most of them isn't like with football, basketball and boxing. Yet, it's one of my favorite event to follow and bet on.