Pretty good reasons.
Check it out:

A Tea Party darling and purebred conservative, Cruz ran on one “simple” idea: Saving our country. And he won because he had the ability to do what very few in Washington have been able to do since 2008—inspire those listening to him to stay active and vocal.

“The velocity of the issues that are swirling about the Senate is remarkable,” Cruz says. “But at the same time, it’s exhilarating to have the opportunity to travel the state of Texas, to travel the country and listen to the American people. There are so many men and women who are energized, who are passionate, to turn things around, that I can’t help but be inspired every single day.”