August 19, 2013 at 11:22 PM
Perhaps the biggest irritation of developing for RT (or doing anything with XAML in general) is dealing with styles. There's no way to see a list of all the default ones, or the ones you've made yourself that are available in the current scope. You have to remember them, resulting in lots of tedious back and forth.
Here's the standard RT ones just dumped. They all have a margin of 8 added to space them out.