For those of us over 60..


What band's output would you say best describes you/your life as you see it?

For me, Allman Brothers
128x128slaw
Captain Beefheart, Rare Earth, Captain Beyond, Mama’s & the Papa’s, Clapton,  Beatles, Stones, Pink Floyd...  
Can’t pick just one.

JD
Captain Beefheart and the Magic Band. Jefferson Airplane. 13th Floor Elevators.
Thin lizzy, van morrison, paul butterfield, big star, joe bonnamassa, bob Marley, peter tosh. Good thread!
Pink Floyd, Genesis, ELP, Yes, Beatles, Zep, Rush, Tull, Steely Dan, Hendrix, CSNY all form equivalently the foundational plinth of my musical soul.

The brick and mortar that overlay all that and form the next layers are too many to list.
To many to list but The Beatles, Moody Blues, Dylan , Pink Floyd are the first that come to mind. 
+1 wcfeil

The 7 original Moody Blues albums defined me as a teen and later as an adult. They were the first progressive band and unique to the British invasion.

George Gobel and the Naught-so Notty-boys.

Followed by Dylan and The Beatles.

DeKay
Ray Davies and Pete Townshend pulled me into this thing at a personal level.  Artistically I've been drawn all over the place, but Davies keeps me going. 

slaw, I don’t know what you mean by "best describes you/your life as you see it." I’ll just say the band that currently really knocks me out is The Fabulous Superlatives, Marty Stuart’s "backing" band (they are actually more like collaborators), comprised of the fantastic Nashville studio drummer and harmony singer Harry Stinson (he is SOOO good), guitarist Kenny Vaughan (I first heard him live in Lucinda Williams’ band on the Car Wheels tour), and Nashville studio pedal steel great Chris Scruggs playing bass (he’s also a real fine drummer).

If you want to be as blown away as was David Letterman, watch the clip of Marty and TFS performing live on Dave’s old show, viewable on You Tube. Just insanely great.

Not quite of age, but can I play in your kitty litter?. 
The band 'Madness'. not only for the music but they are from my part of Town also.

Off the top of my head, I'd have to say Cream, followed by some Crosby, Stills & Nash, some Allman Brothers, some Stefan Grossman, with a little Santana thrown in for good measure.
This is a very interesting and provocative question OP, and I don't think one band would cover the whole spectrum for me; there would be about ten I guess.
For the present, I'll say Squeeze and Beck. Both appeal to very different parts of me. 
Being just 58 I hope I can play in your sandbox....

However with also being English what I grew up with is likely well different to others here.

My defining band and musician would have to be Deep Purple and Ritchie Blackmore. I just dug ( and still do) the whole fantasy escape that music truly is.

While the vast majority of my peers raved over Led Zep and Pink Floyd, I was banging my head to Purple, Sabbath and Hawkwind.
If a solo artist rather than a band can be cited, for me it's Iris Dement, then Buddy Miller. While not wishing to sound pejorative, there is a reason band members aren't solo artists ;-) .
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@mental ,

I dig it dude!  I'm listening to Ryan Adams "Cold Roses" right now.
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Crosby, Stills, Nash & Young

As a group and individually.

After that it would be Dylan.


Rich 
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