I have many, many fond memories playing the original Ultima
trilogy. I didn't play as much with 1, but I spent a ton of hours on 2 and 3. I remember how cool it was to be able to wipe out entire towns of folks. 3 had such a unique end character for its day and the introduction of the party in the series led to a few of my friends coming over and playing one of them during combat.
Today, GOG.com has the first 3 Ultima games
for $5.99. That's a pretty good deal and you can experience one of the games that help start the RPG craze back in the day. If you're an RPG fan and want to check out an awesome series, then this is it.