Why I choose native code over PhoneGap or Appcelerator Titanium

My views on this front have always been the same as this article. If you're really going to commit to building an application for a platform, take the time and learn to do it correctly. Yes you could do it faster in a language that you're more comfortable in, but in terms of the experience of people who don't care if you're more comfortable writing in JS or HTML, it's worse for them (usually not always I know)