New user here.
Denver, CO. I got my N900 two weeks ago.

I did substantial research before purchasing, but failed to look at forums, so I was unaware of some of the issues with the N900, like no MMS and poor portrait support.

Once I got it, I was somewhat conflicted about keeping it. A Nexus One was only $50 more, and was in my mind the newer/fancier/nicer gadget. But, I kept reading the forums, kept customizing my phone, and kept thinking about it.

Then, I decided to browse a few Nexus One forums. I knew they had to be out there.

And what do you know?
They have their own issues too.

Spotty 3G, update problems and interface complaints, to name a few.
One thread, titled "Anyone have a problem-free N1?" mirrored the sentiments of a frustrated user here.

I haven't had any real issues so far. I miss MMS, and I had an interesting portrait glitch a while ago. So, I'm going to enjoy having the underdog OS, and go back to lurking.