Why not other packages?

Though it might look strange I prefer explaining it here. The selection of tools is more (or less) a matter of personal taste. But there should be some reasoning behind it. If you want to make simple drawings, you may choose either MFpic or a similar package or directly ${\logo META}$ ${\logo FONT}$ . In either case you must learn some new commands. However, MFpic supports only a subset of ${\logo META}$ ${\logo FONT}$ . Later, if you need more complex pictures, you have to learn a new tool. With ${\logo META}$ ${\logo FONT}$ it's a bit easier. You just learn some more commands.

It's not a good practice to reject everything what has been done. you can find files with ${\logo META}$ ${\logo FONT}$ macros which can be used in a similar way as L^ATEX styles. This can make life much easier.