Ah, neat! I used to play on a private roleplaying server called AeonRO. Sadly I stopped playing because the people I used to roleplay with stopped playing. To answer your question about RO2, it's pretty fun! Merchant class is gone, everyone has access to a profession class (Mage, Acolyte, etc.) and a job class (Blacksmith, Alchemist, etc.) Anyone can set up a shop and sell stuff, and the higher your level the more slots you get. Upon hitting level 30 I went from having 10 slots in my shop to 20, which really opens up more money-making opportunities! Also RO2 is the only free MMO I've seen that lets you have an auction house system without making you pay RL money to use it. I usually have items in the auction house at all times, then when I sleep for the night I set myself up in my character shop. I am rolling in zeny.

Like I said in the OP, this is one of the few MMOs I have ever played where I made a character and actually stuck with them. There is plenty of quests that take you through each area, as well as special Khara quests (which you can just think of as achievements) which unlock titles, etc. Complete different Khara quests in a row and it will give you zeny and experience.

Also @ the Tibia post, loved that game!

The unfed mind devours itself. - Gore Vidal