Here's a great online resource covering all things to do with music: allmusic.com. Type in the name of any artist. Any album. Any song. Allmusic knows it, can tell you about it, provide samples, sell it to you, and offer myriad links to do with it.

Let's start with someone you probably know about: Radiohead. The main page for the band gives you an overview, and you can click for more detailed sub-pages featuring the band's Biography (in a few paragraphs), Discography (click on any album title for track listings, short audio samples, credits, chart rankings and awards nominated for and/or won and a review), Songs (lists of all their songs and every album those songs appear on, including covers), Credits (everyone who's worked with them on any song or album), Charts & Awards.

Back to the main Radiohead page. It lists who they've played with, who they're influenced by, who they've influenced, similar artists. And of course you can click on any of those names and get their full story and credits and links.

It lists the genres they play in, the styles, and possibly my favourite detail on the whole site: Moods.

How would you describe the various moods of Radiohead's music? Could you? Allmusic can. Here's their list:

Austere

Cold

Epic

Paranoid

Sprawling

Angst-Ridden

Atmospheric

Brooding

Cathartic

Distraught

Eerie

Insular

Melancholy

Provocative

Suffocating

Tense/Anxious

Theatrical

Wintry

Wistful

Detached

You can click on any of those terms (I just chose "sprawling" at random) and you're taken to a page for that term. For "sprawling," it suggests similar moods: Aggressive, Cathartic, Druggy, Energetic, Indulgent, Rousing, Trippy - and more. Top Artists for "Sprawling" include Beastie Boys, Pavement, The Band, Genesis, Wu-Tang Clan. Top Albums for Sprawling include Exile on Main St. - the Rolling Stones, Mellow Gold - Beck, Tales from Topographic Oceans - Yes.

This is a web of information it'd take a lifetime to exhaust.

And I can't help but check out how they describe the moods of a few other artists I'm into:

Sam Cooke:

Confident

Elegant

Joyous

Passionate

Relaxed

Carefree

Gentle

Romantic

Smooth

Amiable/Good Natured

Earnest

Energetic

Exuberant

Happy

Laid Back/Mellow

Light

Plaintive

Refined/Mannered

Soothing

Neko Case:

Autumnal

Bittersweet

Earthy

Literate

Melancholy

Organic

Passionate

Plaintive

Poignant

Reflective

Rollicking

Rousing

Raucous

Intimate

Tom Waits:

Confident

Eerie

Fractured

Atmospheric

Autumnal

Bitter 

Bleak

Brooding

Nostalgic

Quirky

Somber

Wry

Boisterous

Cynical/Sarcastic

Literate

Nocturnal

Ominous

Theatrical

Witty

Confrontational

Steely Dan:

Literate

Smooth

Sophisticated

Acerbic

Cerebral

Cynical/Sarcastic

Enigmatic

Ironic

Laid-Back/Mellow

Quirky

Relaxed

Sardonic

Slick

Witty

Wry

Autumnal

Bittersweet

Eccentric

Elegant

Humorous

John Zorn:

Brash

Fractured

Uncompromising

Visceral

Aggressive

Cerebral

Elegant

Fiery

Intense

Provocative

Sophisticated

Stylish

Confident

Difficult

Energetic

Freewheeling

Manic

Passionate

Ambitious

Confrontational

Robyn:

Bravado

Fun

Quirky

Bright

Light

Theatrical

Confident

Dramatic

Exuberant

Party/Celebratory

Rousing

Sensual

Sexy

Stylish

Swaggering

Uncompromising

Confrontational

Lively

Rollicking

Street-Smart

Jim White:

Atmospheric

Eccentric

Enigmatic

Acerbic

Bittersweet

Earthy

Intense

Literate

Raucous

Rebellious

Spooky

Gutsy

Searching

Visceral

Quirky

Wistful

So who do you like? How does allmusic.com describe them? How do you?