I try using Org-mode/Latex with pandoc, but end up using only Office for docx and PowerPoint.
Depends on the use case. For my own stuff I usually use LibreOffice, for docx compability I use OnlyOffice and for presentations I use Latex with TexStudio.
Mostly Markdown too, but I wouldn’t call that an “office suite”. I rarely use classic office suite software. If I have to, LibreOffice and at work I had to use — surprise — M$ Office.
Always used and will be using LibreOffice. It just works for me.
I’m quite happy with libreoffice.
It can be a piece of crap sometimes but less so than MS Office.
With LO I have a passionate love-hate relationship.