My top 3 altcoins are:
1) Etheraffle: a hidden gem of a token that will be be be the lotto for the entire planet.  Most of the development work is done.  What's really left is getting the exposure.
2) Ethereum: As more tokens are introduced using the ethereum network, it will be continue to grow in market cap as well as technical aspects.
3) EOS: Lot of development work is being done.  The potential to be a real competitor to Ethereum.