I think one major dilemma with People who have been in the music business for too long is, that they have 'said' the things they wanted to say with their early works, the ones where they were still passionate about doing, changing and creating something. This passion is within everyone who enters the scene, but it naturally wears off.

After a while you need to come up with new ideas, but since you can't go in a totally different direction with every record, you kinda stick to your style and start limiting yourself. Then after a while you start becoming bored with your sound and feel the need to "evolve". Usually this means your production level will rise, your tracks will become more sophisticated and more "intelligent". But this is a good thing, right?

Well... maybe not. I got the theory that this process kind of kills the accessability of your tracks. It's usually the simple things that work. Simple beats, simple melodys - nothing fancy, just a good groove to get people moving. No thought, just emotion. When you burden your listeners with too much structure in your tracks, you will make your longtime fans happy, but you will loose the youngsters, who want uncomplicated accessible techno in the sound of today.