Do you use Lets encrypt?

I mainly use letsencrypt because its way of exporting certificates is actually the most easy for Nginx, since you don't have to touch any file. Most SSL providers (besides not being free), give you a full bundle file with extra certs, or things mixed up and you just can't configure it straight out of the box withouy worrying.

Of course, automatization is important. You can also ask for 4096 bit certs, others only give you 2048 and if you pay more they give you 4096 (seriously?). Some don't even have 4096 bit certs.