Very good query man:). I don't deny saying I don't like 85% of Robert's work solo.....it just wimps out with respect to Zep's sound....he only got back into the saddle when he collaborated with Alison Krause:)
There was NOT a single day that us students at OF High SChool in Australia didn't talk about Zep....even the chix got into the conversation esp when Robert Plant was being "analyzed", hehehhe
NEVER....and I repeat NEVER did Led ZEp sell out on their philosophy and sound.....UNLIKE many overrated bands out there today (e.g. Pink Floyd, The Wall period;);)