Ulitma Online official servers is now free to play with some restrictions to storage, housing and pack mounts.
>Exact Restrictions
https://uo.com/wiki/ultima-online-wiki/beginning-the-adventure/endless-journey/
Why play?
No Classes: Make your own character
No Levels: Your skills go up via usage and your stats go up by relevant skill usage. E.g. STR goes up with mining.
Crafting: Combat items, furniture for housing, consumables.
Theft: Steal Items from peoples back packs or their pack animals. Steal decorations from dungeons.
Treasure Hunting:Treasure hunting system to locate and dig up treasure boxes.
High Seas: Sail, fight or pirates for bounty system, fight orc navy, sea monsters, deep sea fishing for treasures.
Housing: Non-instanced housing. Some people play the sims with this. Some people create huge department stores to sell their crafts and loots. A few players have created public Rune Librarys (Teleportation locations around the whole world).
Combat: Plenty of areas and dungeons to fight in. Mostly in the open world, more profitable in Felucca (PvP land) so you many need to travel in groups to fight off murders or competing adventurers.
Animal Taming and Training: You can tame any beast like creature from rabbits to dragons. They can also be trained, you are able to select the skills, stats and abilities for your pets, almost as customizable as a player character.
PvP: Dueling, Guild Wars, City Battles (VvV system), Open World PvP in Felucca (Exact copy of Trammel/PvE-Brittania but with better resource gathering and loot).
PvPvE: Champion Spawns at Felucca Facet. Champion Spawns are like an army of monsters and boss found in various dungeons around Felucca. Once activate, plenty of monsters spawn, you must keep killing em to lure the boss to spawn. When the boss is defeated it drops plenty of gold, good items and power scrolls. These scrolls allow players to break the skill cap of 100 up to 120 and the stat cap from 225-260. This a lucrative activity found only in Felucca so PvPers will likely crash the party to finish the boss, steal the loot or just for fun. Thieves can also steal these scrolls from PvP and PvE players alike.
Probably stuff I missed too, comprehensive skill list: https://uo.com/wiki/ultima-online-wiki/skills/
>Notable Servers
<Normal
Atlanta is the most popular server for Americans
Oceania is for Oceanics and SEA players. (Server is actually located in Australia somewhere)
Formosa is the second place for SEA players, mix of English and Chinese (Servers in Taiwan)
Hokuto is a Japanese server with some english speaking population from US Soldiers stationed in Japan, most migrated to Oceania though.
Europa is for Europeans
Drachenfel is for Germans.
Rest of the Servers are either in the US/Japan/Korea. If the server name is english it's US, japnese name is japanese, korean for korean.
US server population is highly concentrated in Atlanta, some other US servers are pretty dead (may be a good thing if you want to do Champion Spawns in peace.) All of the Japanese and Korean servers are populated imo.
<Full PvP everywhere
Siege Perilous (US)
Mugen (Japan)