I'm having the exact same experience! I just started using Python 3.4 (soon 3.5) for a new, major project and I'm pretty excited about it. I expected to find a bunch of roadblocks -- like being in a parallel universe or something. But, well, everything totally works!

The only package I found that didn't work with our Python 3 infrastructure was Fabric, but that's really easy to spin out (and will be fixed soon).

There's really no reason to not use Python 3 for (almost) all new projects at this point. It's exciting! I expect engineers who're used to developing in Python 3 will start to feel embarrassed that they're still running 2, and we'll port over all of those internal codebases (like at Dropbox :P).