Dark Age of Camelot was the very first MMO to catch my eye, though the first one where I played hardcore mode was Silkroad Online. Later on after leaving SRO I was introduced into RO and settled there.
Life, and it sucked from time to time 
(Ultima Online here)
MMO: RO at 13yo. My first love. 
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My lover was MOHAA or Medal of Honor: Allied Assault 
RPG: Books at 8yo.
Runescape - 2001ish, Battleon (if you count it) 2002-ish, Ragnarok- 2004-ish.
Flyff " Fly for Fun " when it came in Germany out in 2006 but i played it already 2004 in the English Server ^^
Star Wars Galaxies in 2003, World of Warcraft in 2004.
Yo,
I remember a Tikal Yagami on Chaos, did you have a friend called Atos Kel?
Everquest the original 2000 or 2001. I still remember begging for spirit of the wolf.
My first MMO was Ragnarok Online in 2005 or 2006. Immediately drawn in by Archer, managed to leveled my way up until Sniper level 70 (or so, forgot the details). Got into a guild, fought my way in WoE. Mostly focused on traps and falcon, so my damage isn’t that great. Quit RO in 2007.
While I played RO, I also played GunBound (if you could call that an MMO, that is). Favourite mobile was A.Sate and Turtle. Managed to master Boomer after 2 or 3 months of struggling, but immediately quit afterwards because of aimbots (and also acccused by many players of using one).
Started with RO. then Lineage2 for many many years
RO was my first MMO… i still remember i made a thief class as my first character XD (2001 or 2002 i think)
Ragnarok Online. Back in like 2006.
Meu primeiro mmo foi lineage 1! Joguei por poucp tempo até descobrir que tinham lançado o lineage 2, o qual fiquei lá por muitos anos jogando depois joguei ragnorak e depois joguei vários e vários. … porém o que trouxe uma experiência melhor com certeza foi o lineage 2!
Eden Eternal. I can’t exactly remember when but I think it’s around 2013 - 2014.
The first MMO I’ve ever played was FlyFF. I started playing it in 2005 or 2006, I think, when we were still using dial-up connection. Fun times.
Ragnarok Online! 
My first mmo was Diablo 2 if i remeber right.
Then RO comes and my sociale life went on vacation xD
First one was Ragnarok Online, Malaysia. Good times indeed!
The first I ever played was Ragnarok Online, I think that must have been in 2004. I tried many MMO’s afterwards, but you will never forget your first one 
The first was Ragnarok Online. I started in 2004 still with dial-up connection.