I`m currently studying C++ and want to learn another language.
For work I use C# + ASP (just started learning it, actually), but I want something "less Microsoft" and powerful.
I have heard Python is a popular and powerful language, not so complicated as C++. But many people mentioned it was hard for them to get back to C++/Java from Python because they started thinking in it, get used to absence of memory management, etc.
What do you recommend?
There's no right or wrong answer, really.  But I think you'll benefit more from learning Python.  Given the similarities between C# and C++, you'll learn a different way of thinking from Python.  The more ways you learn to think about a problem, the better it makes you as a programmer, regardless of the language.
Should I learn Python after C++?