Me, N900 monomaniac.
I feel like a fish into it. Comfortable, warm, known environment, fluid feeling of use...
Lazy and afraid to dive into a fresh-new-cold-unknown-something-else. Rearrange everything, loose habits, convert things...

Maybe a Pro1, once, for a better camera and for the ability to watch videos decently. And a bit more speed with a filesystem, calendar and contacts getting really huge after so many time. But still, can doubty blobs and backdoors be excluded on a Pro1 (as well on a n900 btw...)?