So most people know by now that the new Rider is played by R5/ Iwanaga Hiroaki. The guy is hilarious, you should read his blog. In particular, I want to include his blog entry from right after his first appearance in Kamen Rider:
http://ameblo.jp/hiroaki-iwanaga/entry-10748960679.html
"As for Kamen Rider, I'm going to dash into the New Year's and rampage! Cute baby-tachi, don't fall in love with me! Good! My heart's been scaled before. No wait, sorry, I'm so tired that I'm going a bit nuts"