I really enjoy some of the more flexible syntax and design choices present in some other languages. It also help that various job requirements over the year have required that I build a broader skillset. Finally, the growth I've experienced by stepping outside my comfort zone the past few years is probably the best benefit, which is a good experience regardless of which language(s) you start with.

In the end, however, as we both know, most decisions in software development are an exercise in managing tradeoffs. I guess the core of my argument is that, in the past few years, PHP has done a great job at improving its balance of tradeoffs.