My all time favorites are Ethereum, Litecoin and Dash. We have our own preferrences of choosing the right coin so that will all depends on us whether we go for the recently released tokens or coins already listed on coinmarketcap. Just make sure your coins or tokens have potential so you won't regret your decissions in pouring some investments to your potfolio this year 2019. I myself don't like new coins but if they seems to have potential then I will surely join it's bounty to have free tokens.