My N800 goes pretty much everywhere I go, save for situations in which I don't have a backpack or some place to fit it since it doesn't fit well in my pockets. I just recently purchased a HTC Touch Pro and am completely underwhelmed with the WM6.1 experience (coming from a HTC Typhoon with WM2003)-- no devices I have had the opportunity to play with can match my N800 in terms of software quality and usability.

However, I find my tablet lacking in some areas that other devices excel: video performance (i.e. scrolling in MicroB) and 3d video acceleration.
I greatly await the arrival of the N900 or whatever it'll be called, but only if we are treated to the entire feature set promised by the Maemo guys at the conference.

Basically, if it can fit in my pocket and watch native DVD formats, Nokia gets a large chunk of money courtesy of my pocket.

I only hope it manifests its self before someone else ports Android completely to my Touch Pro... it would be much harder to convince myself to purchase another device if my phone ran Linux (and that is a HUGE selling point for me).