Wow, I've been playing with the Designer in Blogger Draft for a few weeks now. I can't decide which template and custom configurations to go with, so I just change it a lot.
I used to customize Blogger's XML Templates.. that was fun to mess with. I just followed everyone else's hacks. There's always something you'd like to change no matter how many or how nice the new templates are and no matter how many changes you can make to the design. It's the hard wired stuff you'd like to change like 'new post'/'old posts' , stick a few graphics dividers in between posts, fancy up your Widgets and Gadgets.....
I sure hope the HTML/XML template Guru's out there can figure out how to hack the NEW Templates.