Ofcourse you would want to go with Cardano and Polkadot as Cardano has been on the top 10 in CMC and Polkadot has its own projects like Parachain Auction with Kusama
But I personally only like Cardano, because among the three tokens, only Cardano made me interested in owning it at the same time for me to trade as well, because I also benefited from trading Cardano earlier this year.