I too have come to dislike YouTube to a certain extent. The culmination of the lacklustre new white channel design, the constant and ever growing Google- merging, the completely scheiße vlogs, the wham-bam videos and horrendous music videos that dominate the viewership spectrum have all made me cringe.
That said, YouTube offers an unparalleled audience, and still has a lot of really good stuff on it. I look at Vimeo, and it's frankly like breathing in some fresh air. The video player is truly beautiful, the content is great, there are hardly any white backgrounds anywhere. But there is far less of an audience and that's what decides it for me in the end.
I've decided that I'll set up a YouTube channel for my animations, and a snazzy Vimeo channel for any behind-the-scenes stuff and tutorials.
And on the original topic, I personally think it's a tad stupid to not monetize your videos, if you've got something successful, you should capitalise on it.