You have to look, at least briefly, in the project you want to take part.

In my opinion, I think taking part in all the airdrops you see it's not worth your time.

It's better to choose which ones can make you earn something and which ones don't. And so where is better to spend your valuable time  

For example, I want to share with you guys a good airdrop that I have just discovered: RAWG.

I give you here all the relevant information.

This is the airdrop site: https://token.rawg.io/airdrop.

It only requires just a few tasks to be done. Very easy and fast.

And the ICO site is this one here: RAWG. It's a video game discovery platform that converts your skills into goods and services.

You can earn tokens by playing your favorite games. The site is already working, with more than 50,000 games in the database and new games are getting added every day. This is the site: https://rawg.io/

Quite good looking, don't you think?

They have just started a very rich Bounty program for everyone who is willing to participate. Here's the link:

https://bitcointalk.org/index.php?topic=3333252.msg34856268#msg34856268

with a nice referral program that can double your rewards.

Have a look. I hope this information is helpful!