I support any and all EU laws against Xitter out of spite, they could be making Elon Musk square dance for every piece of misinformation for all I care.

The office versions are so confusing and frustrating. I just wanna use the goddamn desktop program and not some web app.

Also it forwards your SMPT/IMAP data to Microsoft without your consent.

For me it was first VLC without really knowing what FOSS was, then KeePass while getting to know a bit about it, and finally Thunderbird. What did it for me was just how good and bullshit-free they were, especially in comparison to paid competitors. They really are the best products in their field, proving the quality often behind FOSS software.