1. Answer: It depends on everyone's taste and these rankings change all the time. According to RankMyPorn, at the moment, the top ranked Who Cares Male Pornstars in the world are: Tommy Gunn, Luke Hardy, Mark Ashley, Van, Marcus London, Frank Gun, Michael Stefano, Jay Snake, Davin King, Tony De Sergio, but these will change based on what people vote.
2. Answer: It changes. You can see the latest rankings on RankMyPorn.com and also vote on it for free.