For me, it definitely did. I started with Perl and system C, so my style 
was originally very hacky. Later on I turned to Python and it taught me 
how to write cleaner interfaces.

Now that I know how much influence it has, I strive to use Lua for my 
personal code, and the way it shapes how I think is my main reason for 
that. It balances the bad habits I sometimes get from working at a Ruby 
shop :) The next language I will learn in depth will probably be a LISP, 
for the same reason.

The tools you use have an influence, too. When I'm at home, I write code 
in nano, without syntax highlighting, in a 80x24 terminal. I found out 
it helped me focus on important things and write locally meaningful code 
from my systems / network programming background.