The only thing that stops me from switching from Google is pricing. I have 2 niche blogs (does that count as commercial?) as a side project that barely makes any money and paying $180/year is completely unrealistic. I would switch without blinking with a more friendly pricing.
I'm not too fussy about it; if you have a small side project with a reasonable amount of traffic that earns you a little bit of pocket money then that's just "personal" as far as I'm concerned. It's really hard to codify these kind of things, so I just made it "commercial/non-commercial" which is simple and clear.
Hit me up on email and we can arrange something: support@goatcounter.com