Hello!In my opinion, PokerStars is the most attractive. Firstly, there are a lot of players there, and there is a lot of money. Secondly, there are a lot of different tournaments with different buy-in range, and each player can find a suitable tournament or cache for himself. Thirdly, there are regularly held various promotions that help increase your bankroll. And lastly, even in tournaments with high buy-in, you can participate by selecting through a number of satellites, which will not significantly affect your bankroll.Thank you.
P.S. I'm writing from Russia