Fixing the unicode mess is nice too of course, but you can get most of the benefits in Python2 as well, by simply putting this at the top of all of your source files:
from __future__ import unicode_literals
Also make sure to decode all data from the outside as early as possible and only encode it again when it goes back to disk or the network etc.
I never really understood the "rather stay with py2.7" thing. I get it with big old monolithic applications. You don't "just" rewrite those, but _every new python project_ should be done with the latest stable release.
Is anyone starting their PHP projects on PHP4? Any new node projects in 0.10? Of course not, that would be moronic.
I mostly avoid writing Python 3 nowadays, because I don't want to rewrite my project or find painstakingly an alternative solution when I could have just imported a module that runs fine under Python 2.