The best way to know which ICO is best is by doing your own research. There you will be able to understand what exactly you want and which project is good for you. Give 2-3 days to your research work before investing. Everyone here must have invested somewhere or the other, but almost all of us know self-help is the best help.
I have currently invested in 2 ICOs which are running really well. Telegram ICO, they have launched this ICO to re-establish Telegram and make its value in the market, which according to me is going well. HashGains ICO, they are collecting funds to establish Green Data Mining Centers in two Nations Canada and India, which appealed me a lot.