I hear ya Phil. I kinda like the new stuff, but not as much as all their old stuff. Their first album is still my favorite; 1,039 Smoothed Out Slappy Hours.
MCR makes me want to vomit, I think they're just awful. I haven't listened to a ton of Green Dy, admittedly, but I think they're incredibly over rated. I really don't like either of them.
I have not heard any of Green Day's new stuff. But then again, I have been finding that a lot bands that I used to listen to in high school are one of the following
* Split up.
* Sucking big time.
Green Day for sure. Older stuff though...I don't really like ANY new music except for "some" electronica. Seems like pretty much every genre today is just complete and utter crapola.