What's your fav FS and why?

Hello me lovely drones. My last question regarding what kernel version to use was so enlightening (I thank everyone who replied), so educational that I've decided to ask another question. I'm currently using JFS. It's fast, reliable and easy to repair. On the rare occasion (once in 20 years) were I wasn't able to fix the fs (after a hard drive death rattle), I was able to mount it as a RO fs and recover the data with a simple copy and paste (later rsync and luckbackup). However jfs has it's limits for example it can't be resized, something I needed to a do a few times. Which meant backing up the drive, reformatting and restoring said backups. So... July's question... What's your fav FS and why? I thank everyone in advance and look forward to assimilating your brainz (ooh a SciFi / Zombie mix there). Kate AKA The Borg Queen. PS If you think about it, the Borg are sort of "Techno Zombies".