Windows Mobile for Nokia User
HTC does dominate Windows Mobile because they've done it so long, but my first Windows Mobile phone was actually a phone by Samsung (the SCH i760) in 2008. This was a sturdy well made phone, and I don't know why VZW stop selling it, but I loved it.
Having owned the Nokia N97 flagship I thought the Windows Mobile community in the US at least is larger. When I used a Windows Mobile I thought the community was large, and there was plenty of information about customizing, flashing..whatever you needed. Nokia seems Europe and Asia focused, and although I know Nokia is trying to remedy this I always thought of the phone as non-US which is fine. Windows Mobile also has some really cool apps like coreplayer. A Windows Mobile phone like the Touch Pro 2 or HD2 can really do it all for you.