For problems title indicates, to divide personal use PC configuration, professional needs to answer:
In upgrading software every year, not development will be eliminated, so, in general: Basically, most of the new software more "useful" . The so-called easy to use, that is, three: 1, running smoothly; 2, fully functional; 3, with a comfortable
However, this "useful" There are two subjective conditions: 1, configured; 2, will be used
Configured, Asia definitely recommend the new version (a version lower than the latest version), the new sub-UI interface and basic functional stability is good.
Then, the configuration is not good, it will not use, how to choose it? I recommend using the 2010 version.
First, you can have a first look at what the 2000 version of CAD functions:
Information Screenshot Source: http://www.xitongtiandi.net/soft_tx/4244.html
Functionally, when CAD 2000 version, already has all the basic drawing functions, editing operations and 3D capabilities, it seems to do basic drawing has to meet the demand.
After the increase of the CAD 2006: dynamic block; and dynamic input.
CAD2007, the complete three-dimensional modeling features: loft, sweep and other functions, in both versions later, also in three-dimensional force fields, enhance the three-dimensional features.
Until 2010, in the three-dimensional surface modeling but also has been greatly optimized, and drawings can export PDF files, increasing the operating parameters of the version of the 2010 CAD software, of course, this version of the parametric drawing due just shelves, so the plane applies only to two-dimensional parametric; to version 2011 also began to support the three-dimensional parametric drawing overtaken
界面上：UI设计上，自从2010年起，软件的操作界面更是直观简洁：将常用的功能分好类，统一集合到一个统一的面板。并且从2010版到现在，基界面设计上的改变不大，大多是优化和美化。当然，如果用不惯新版的界面，还可以选择其他界面：经典界面、三维界面、草图与注释。不过，本人推荐用最新的操作界面，因为在2016版的时候，经典的操作界面就被取消了。目前很多软件采用的UI设计和CAD中的二维草图与注释是很相似的，这种界面的优点：1、简洁美观；2、操作方便；3、功能更加可视化、现代化。
以下是经典界面、草图注释和2019的界面：（感觉还是2019的好看）
总结，2010版是新版的基础版，即呈上了自家先辈软件的功能操作，又启下了后辈的完善优化。不负责任的讲：二十一新世纪以来到之后的十年，软件在二维方面的功能是没有革命性的变化，一般的二维做图、审图，已经达到极为优秀的状态，如果你想要CAD画三维，你可以使用高版本（额，做三维的话，我想不通为什么要CAD呢？市面上有一大堆专业优秀的三维软件可以用呀！）。