Balance in MMOs - Methods?

[Lokked]

Hi all,

I'm bored at work and am thinking about MMO Class Balance in general, and wondering if anyone knows of any 'official' doctrines of MMO Class Balance, or methods that modern companies use to tackle this issue.

Here are some questions which will help me out!

What is the most Balanced MMO you've played. What made it Balanced?

What is the most fun MMO you've played, overall. What was fun about it?

What is the most fun single situation you been in, in an MMO? What was fun about it? If you can't decide about what was the most fun, perhaps you can make a correlation between the activities, and give a general rule of what 'fun' is to you.

Thank you!