This is one tricky question.
Autodesk Maya is an industry standard for 3D Animation, Visual Effects and Games development industry. It is software that art schools teach.
Learning this software package is what get people into this industry, it is know to be the most recommended application to learn if you are planning to get into any of these industries.
The question I get asked often is what version if the best? Maya as of today is being release in yearly cycle, which means a new version of Maya is released by the end of the year for example the end of 2017, was the release period of Maya 2018 Update 5, which at the time of writing this post is current latest.
Autodesk starts shipping update or service packs to fix massive bugs or to introduce new tools or features to an existing release.
Autodesk offers two versions Maya and Maya LT.
Maya LT is strip down version of Maya, designed for Indie Game Makers and costs lesser than the fully blown version.
You can get a detailed comparison on Autodesk’s Official Comparison page