I have played Utopia off and on since my freshmen year of high school (about ten years ago) and I will say this:
You can have fun with this game, but it will quickly lose it's playability if you don't have an active, team-work oriented kingdom. In the beginning, as a small fry, you are kind of under the radar. As you get larger people will be watching you and will often leap on you if you're undefended and no one in your kingdom can hit them back. In these situations expect to lose many times over the land you gained.
Wars equate to how active the kingdom is and how often people attack. Usually 1-3 dudes end up taking ALL the blows so each war ends with most of the kingdom getting bigger and a few, or many depending on how the war went for your side, will be decimated. Wars often turn into a battle to keep your land even and your troops in the field as often as possible.
Any kind of higher level play (and I mean getting anywhere near the top 10 on your island) will require you to log in 2+ times a day to expend your resources and attack. If you're an attacker you'll need to be attacking at least twice a day, but most kingdoms will request you are attacking 3 times a day. As a thief/mage you will need to be running 30-40+ ops a day.
It's fun when you get an active kingdom. It sucks balls (after the initial week or two you play the game) if you do not.