This was also my first MMO. Only ever played the trial - remember downloading it on my 56k modem (and it was some 2GB big or so). Remember the light blue armour and the wooden swords. Unfortunately I was too young to pay monthly to go past the trial, so only ever got to level 11 (which I think was the cap?), but still used to log in and talk to people.
I actually downloaded and logged into a (presumably private) server a back in late 2011 just for nostalgia - didn't do anything on it though.
Then I moved on to Lineage II which has become my favourite ever MMO (although I no longer play it).
I think what makes these MMOs so great is the open world PvP and clan systems - all of the modern MMOs have instanced raids and rolling for loot which just lessens the thrill. More 'hardcore' MMOs with smaller communities are much more fun. Shame there's nothing out there nowadays like that.
Edit: I'm confused as to whether I played Mir 2 or Mir 3 (and why isn't there an original Mir?). From memory it looked like the screenshot here, although all of the images are vaugely named in Google search -
http://www.freewebs.com/amka47/Legend of mir.jpg