Call me a masochist, but I love the huge amount of selection, I love how passionate people are about their own solutions meaning they rapidly improve, and I love getting my hands dirty with pretty much anything I can get my hands on.
That last sentence conjured an image of a person trying to drag a giant toolbox with him everywhere for some reason :) I do tend to disagree with the sentiment though.
The initial time investment per tool is steep.
Also, the tools' values deteriorate rather rapidly. Languages/Frameworks will become less used over time as something new replaces them (generally), and even your specific skills with a language will get worse over time if you aren't using it.
It's great having too many tools in your toolbox.