The title is pretty self-explanatory. It's a long read (over 4000 words), so get yourself a drink and settle down.
Please read the article before replying.
I'm not interested in starting pointless arguments, but I am interested in serious discussion. The article isn't supposed to be the 'be all and end all' of the topic. I'm still learning about game design myself, so I'd love to hear other people's ideas. I learned a lot from the replies that people were courteous enough to leave me on my other threads and I'd like to repeat that here.
The article was inspired by the innumerable complaints that people have made in these forums about the imbalance between various skill trees: Destruction, crafting, and stealth skills in particular.