Agreed. I use my own domain and I use my providers email forwarding to a sass email client. If my email provider pisses me off I just change my forwarding to some other provider. I may lose old mail, if the provider goes away completely, but that's not too big a deal for me and backups could solve it if it was important.

Now, if my domain host goes belly up, I'll probably have a somewhat painful process of porting my domains elsewhere. It's still doable but it would probably mean a few days of downtime.

only use your own domain if you want everything tied to your real name