I love these events. Here's a few of good ones...
"Your people have domesticated prairie dogs and are selling them as exotic pets!"
They only give you one choice there, the equivalent of "Umm... that's good, right?" +1 gold in that plains square.
The "Horse Whisperer" quest is fragging awesome. It challenges you to build 7 stables in seven cities you control. When you complete the quest, you get one of three choices:
1) Use your new knowledge of equines to recruit Horse Archers (You get 7(!) free horse archers immediately in your capital)
2) Upgrade all existing mounted units with the "Sentry" promotion.
3) Put your uberhorses to work - every city with a stable gets an extra food per turn.
There's a "mercy to the enemy" quest that can sometimes show up in the best situations. I was stalemated with Monty over some blasted piece of crud city and wanted peace - of course... he's Monty... no peace. Then an event pops up, something like this:
"A benevolent gesture toward the Mongolian wounded by your troops leaves a chance for peace." Declare peace?
Well... yes. Not only did I get peace, it gave me a +1 "Events have brought us together" bonus with Monty.
