Best pay per click sites?

Do you guys try some PPC site out there? what are the best sites?

Please recommend me and why you think it's good?

twodollarclick.com
clixsense.com
exoclick.com

and many more depends how you are using them.

Ptc sites such as timebucks and traffic boost for are the best ptc sites for me because aside of earning from the site I enjoyed surfing and clicking on the ads from these site. Especially with timebucks where you could earn in several ways while having fun with the tasks and you could explore and learn something.

Bing ads for me is still untapped as I am getting a ton of cheap targeted traffic for the keywords that I am targeting. I believe now is the time to get started with Bing as Google and fb ads are getting strict with their policies and it will take a big budget to outsmart your competitors.