Do you use Lets encrypt?

I use Lets encrypt too with certbot for auto renew

Yes, I do use Let's Encrypt. It is simple to use and easy to renew when the time comes.

I love LE.
I use it on all my sites except for the ones that process credit cards bc I figure some people might look at the cert and think it's shady if it's not from a major CA.

My host (not going to name not trying to advertise) has a super easy interface built-in to their host management to add a LetsEncrypt SSL cert to the site.

Needless to say, LetsEncrypt is awesome. Highly recommend it.

Yes I use Lets encrypt.
Sometimes I use Cloudflare's SSL too.
My hosting situation is a big different - so sometimes i need to buy a certificate

Yep, I use Letsencrypt and it's leagues better than any other service including Cloudflare if all you want is SSL. Yes, Letsencrypt doesnt allow for wiildcard SSL certificates however it's relatively easy registering sub domains - however using nginx requires a tad bit of manual file creation and basic data entry. Another benefit of Letsencrypt is the ssl certificates are stored locally so said certificates are exposed to other applications, for instance, self-signing node instances or GraphQL servers for https enabled API endpoints

of course i use it because it's free on my hosting with siteground

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.

I use just "Lets Encrypt" because its free and my control panel got a plugin for lets encrypt.
Soo.. Win/Win?

Idk why I should use some other certi.

Yes I use it from Hawkhost. They are pretty good and stable