This. I still listen to this.

Boston definitely belongs on my list along with Heart's Dreamboat Annie and Meatloaf's Bat out of Hell. Too much good music to pick only one.

License to Ill was the Beastie Boys debut. Cookie Puss was like a single they played in clubs.

MOTHER****ER by the MOTHER****ERS

The tastes in music here are very interesting.
For me, influential debut albums:

The Ramones first album
Never Mind the Bollocks - Sex Pistols
My Aim Is True - Elvis Costello
REM-Gardening At Night
Gin Blossoms - New Miserable Experience
David Lindley - El Rayo X
Chris Whitley - Living With The Law

These are just ones that come immediately to mind.

Lots of great debut albums mentioned here. These are also worth checking out:

The Paul Butterfield Blues Band - The Butterfield Blues Band
Eric Clapton - Eric Clapton
Jet - Get Born
The Allman Brothers Band - The Allman Brothers Band
The Stone Roses - The Stone Roses

Disturbed - The Sickness is probably my 3rd favorite debut.

Clearly, you idiots know nothing about music.

The answer is obviously "Deloused in the Comatorium" by The Mars Volta.

https://consequenceofsound.files.wor...6/deloused.jpg

This is right in my wheelhouse.

ZZ Top First Album 1971

the follow with Tres Hombres 1973 hard to beat.

Allman Brothers Band is a great candidate.

I think Dane has something with Boston though. Even though the song was written before I was born and I have heard it countless times, "Peace of Mind" is still such a fantastic piece of musicmanship to me. It is such a rounded and complete guitar composition, you can tell that it was written by someone who is a total perfectionist.

I wouldn't call it the "greatest" song ever and not even on a short list of my favorites, but he really squared the circle as a composer on that one IMO.

also

http://wac.450f.edgecastcdn.net/8045...3/01/doors.jpg

Still listen to this once a week on the headphones. Truely missed along with Warren Zevon.

Oh crap, totally forgot about that one! It would def be Top 3 for me. I still have a mint condition "Tremulant EP" that has never been opened somewhere.
On a side note in somewhat of a similar category; Coheed & Cambria's first was amazing, as well as Circa Survive's Juturna.

I love these kinds of threads...kudos to the OP. Lots of good ones here...not sure i can pick just one.

This is one of my fav's...

http://upload.wikimedia.org/wikipedi...Beck-Truth.jpg