I loved the n900 daily from mid-late 2010 to ~mid-2012. Text editor on "Debian". "Desktop" Firefox. Terminal. Maps. Some decent other apps: a good drawing app that I used on the train a lot for whiteboarding.

I liked Maemo 5. Having never used the n810 nor Maemo 4, I suppose didn't know what I was missing.

iPhone did not get copy-paste until mid-2009!

Eventually my n900's microSD jack broke off the board, which I've read was common.