I host it to have my own data under my own roof.

• Nextcloud (everything from pictures, over tax stuff to my keepass database)
• Matrix server (even more important with every government on this planet pushing against encrypted messengers)
• PiHole, that i can also use via DoH from my phone
• Traccar instance to keep an eye on my car, when it's in for service / maintenance / when i'm abroad
• ...

I've worked in the hosting industry. I've witnessed an internal breach, where an employee abused access over a few corners and fetched files matching a certain pattern from all customer VPSes (Virtuozzo container based VPSes have their root filesystem accessible from the host)