I am one of those rare people who actually really enjoyed the thrill of playing a miner (or some other crafter) and having murderers show up and try to kill me for my valorite ingots. It felt like high stakes (in game terms, low stakes in real life terms) hide-and-seek!
Over the years I ended up wearing many different hats, of course. I had red characters and thieves and mage-thief hybrids (by far the most annoying character for people to play against). I participated in guild vs guild combat, I had a tamer, a bard, a smith, a fisherman. I loved everything there was to do in UO. On a free shard I even dabbled in programming, writing a bot to automate shearing sheep and storing the wool in the bank. That shard had a really high spawning rate for sheep so I was able to earn enough gold to purchase a keep to share with my friends in about a week of real time!