I don't think I ever really "got" them when they blew up, and I honestly probably bump 'The Fat of the Land' more these days than when it came out (the two albums before that are sick too). I remember going to the U.K. with my mom ca. '96 or '97 and seeing Keith's face EVERYWHERE and thinking, "man, these guys looking fucking cool!" Even if electronic music didn't quite make sense to me at the time, there was still a mystique there and I'll never forget staying up late to catch the premier of the "Smack My Bitch Up" video -- "whoa! They just showed titties on MTV!"
Apparently he'd tried to reconcile with his ex-wife, got turned down and couldn't handle the news. It's sad that the culture we live in doesn't better encourage healthy outlets for dealing with shit like that, especially for men, as if seeking out therapy is "for pussies," or whatever.
R.I.P.