Not all the time. I have one for my business because clients take you more seriously when your email is not “@gmail.” But for every other activity gmail is cool. Paid email is the best for investment if you want to look legit and organized.
I don't pay for email services. I am using my Gmail very okay free of charge. It is top corporate brands that pay for email services. I am sure I would need a paid customized email as my business keeps growing and expanding.