Three years with Gentoo
I still can't believe it's been three years when I checked the date of installation of my Gentoo, I thought it was only two years. Time flies by fast, I guess. During this period, Gentoo hardly had disappointed me and it was never broken by updating. By broken, it means system doesn't get unbootable or something oopsie which needs some special hacks in order to fix. It works nicely for me.
It's no argue from me that Gentoo isn't suitable for everyone, especially people who don't RTFM and/or STFW, or update system in regular basis. Gentoo requires your attention, but that is same for all systems in my opinion.