I'm an engineer, i find any device that needs constant attention such as gear changing to be a lazy design
the reason you change gear is due to the combustion engine having a limited power band
that's fine, but forcing the driver to fix the problem just feels like a workaround to me
http://en.wikipedia.org/wiki/Variomatic
that will explain the issue, it's simply a matter of engineering it is possible to have an infinitely adjustable gear system that is in the best ratio all the time
I will use automatics when those systems become commonplace in every car because they are better than you, no-matter how hard you try