I participated in a lot of ICOs, bounty & airdrop campaigns in 2017, but only a handful of tokens I am impressed and can name right now with all the regrets of keeping them in wallet with value only by 1/100 to price in 2017:
+ICO: PKT, CMS, CAPP, UTN
+Airdrop: REBL
+Bounty: CS, OPTI, RFR, PSK, CMT, MTC