Do you have a choice for who hosts your email? I'm using Gmail for personal and my company because no one blocks Gmail. I use through school and clients 365 and exchange emails because I have no choice.
Whatever email service you choose or are forced to use will determine your email application or browser to use. You'll still be stuck with authentication with any choice.
If you pick a host for your email recognize that they are shared services and you may get blacklisted because of their other customers. That is why I moved my email to Gmail.
On my computer, I use Microsoft Outlook and have since it came out. It is business caliber and works with Teams and everything else I do every day. That's a high bar not needed for a personal or throwaway email. I have other email that I only access via the browser, but they are not that important to me.
BTW, no matter what I choose, I have zero expectation of privacy. While I don't do anything illegal, if I did, it wouldn't be via email regardless of the provider.
I like to download all my email, so I have permanent copies on my hard drive.
Do you have a choice for who hosts your email?
Yes, but lots of people know my Outlook address. It would be a hassle to switch to Gmail, or whatever, and have to notify everyone. And perhaps miss some people.
I have other email addresses. But most people know my Outlook.