I've evaluated other schemes as well and built my personal site and a few web apps in chicken scheme.

Why do I love it? It can be fast, very fast. You can embed C code if it isn't fast enough.

It is very practical, there are many libs. It compiles to C which makes it pretty easy to add support for many popular libs that are written in C/C++.

A lot of schemes sacrifice speed and practicality for academic reasons, chicken scheme doesn't do this.

The community is fantastic. Everyone is reasonable and kind and helpful.