Okay, I'll play...

Courtyard Niagara Falls, ON
Ottawa Marriott, ON
Courtyard Toronto Airport, ON
Fairfield Inn & Suites Toronto Airport, ON
Renaissance Toronto Hotel at SkyDome, ON
Toronto Marriott Airport, ON
Residence Inn Birmingham, AL (the South one)
Courtyard Dothan, AL
Huntsville Marriott, AL
Grand Hotel Marriott Resort, Point Clear, AL
Courtyard Montgomery, AL
Residence Inn Flagstaff, AZ
Renaissance Scottsdale Resort, AZ
Scottsdale Marriott Suites Old Town, AZ
Marriott Anaheim, CA
Residence Inn Anaheim, CA
Costa Mesa Marriott Suites, CA
Fullerton Marriott at California State University, CA
Long Beach Marriott, CA
Los Angeles Airport Marriott, CA
Residence Inn Los Angeles LAX/El Segundo, CA
Warner Center Marriott Woodland Hills, CA
Manhattan Beach Marriott, CA
Napa Valley Marriott Hotel, CA
Marriott's Newport Coast Villas, CA
Norwalk Marriott, CA
Ontario Airport Marriott, CA
JW Marriott Resort & Spa, Palm Desert, CA
Courtyard Palm Springs, CA
Renaissance Esmeralda Resort, CA
Rancho Las Palmas Marriott Resort & Spa, CA
Courtyard Sacramento Airport Natomas, CA
San Diego Marriott Hotel & Marina, CA
Hartford - Hartford Marriott Downtown, CT
JW Marriott Hotel Pennsylvania Avenue, DC
Residence Inn Gainesville, FL
Jacksonville Marriott, FL
Courtyard Orlando Lake Buena Vista in the Marriott Village, FL
Fairfield Inn & Suites Orlando Universal Studios
Marriott's Royal/Sabal Palms, FL
Marriott Orlando World Center, FL
SpringHill Suites Orlando Lake Buena Vista in the Marriott Village, FL
Bay Point Marriott Resort, Golf & Yacht Club, Panama City Beach, FL
Courtyard West Palm Beach Airport, FL
Atlanta Marriott Northwest, GA
Renaissance Concourse Hotel, GA
Renaissance Waverly Hotel, Atlanta, GA
Renaissance PineIsle Resort, GA
Macon, GA - Courtyard or Residence Inn (can't remember which one)
Chicago Marriott Downtown, IL
Evansville Airport Marriott, IL
Fort Wayne Marriott, IN
Indianapolis Marriott East, IN
Griffin Gate Marriott Resort, KY
Louisville Marriott East, KY
Residence Inn Louisville Northeast, KY
Baltimore Marriott Hunt Valley Inn, MD
Boston Marriott Copley Place, MA
Courtyard Boston Norwood, MA
Courtyard Detroit Auburn Hills, MI
Detroit Marriott Troy, MI
Residence Inn Detroit Warren, MI
The Dearborn Inn, A Marriott Hotel, MI
East Lansing Marriott at University Place, MI
Minneapolis Airport Marriott, MN
Minneapolis Marriott City Center, MN
Kansas City Airport Marriott, MO
St. Louis Airport Marriott, MO
Courtyard St. Louis Downtown, MO
JW Marriott Las Vegas Resort, NV
Las Vegas Marriott Suites, NV
Residence Inn Las Vegas Henderson/Green Valley, NV
Seaview Marriott Resort & Spa, NJ
Albuquerque Marriott, NM
Albany Marriott, NY
Buffalo Marriott, NY
Residence Inn Buffalo Amherst, NY
Residence Inn Buffalo Cheektowaga, NY
Rochester Airport Marriott, NY
The Del Monte Lodge, A Renaissance Hotel, Pittsford, NY
Renaissance Westchester Hotel, NY
Raleigh Marriott, NC
Cincinnati Marriott North, OH (the old one)
Residence Inn Cincinnati North/Sharonville, OH
Cleveland Airport Marriott, OH
Renaissance Cleveland Hotel, OH
Residence Inn Cleveland East, OH
Dayton Marriott, OH
Residence Inn Dayton North, OH
Residence Inn Dayton South, OH
Tulsa Marriott, OK
Residence Inn Harrisburg Hershey, PA
Philadelphia Marriott West, PA
Greenville Marriott, SC
Hilton Head Marriott, SC (the old one)
Chattanooga Marriott at the Convention Center, TN
Memphis Marriott, TN
Nashville Airport Marriott, TN
Renaissance Dallas Hotel, TX
Fairview Park Marriott, VA
Renaissance Seattle Hotel, WA
Seattle Marriott Sea-Tac Airport, WA
Bournemouth Marriott Highcliff Hotel, UK
Glasgow Marriott Hotel, UK
Renaissance London Heathrow Hotel, UK
London Heathrow Marriott Hotel, UK
London Marriott Hotel County Hall, UK
London Marriott Hotel Kensington, UK
Renaissance Chancery Court London, UK
47 Park St., London, UK
Manchester Airport Marriott Hotel, UK

...and throw in a few of the now-defunct properties, such as the Harrisburg, PA Marriott, the dreadful Pittsburgh Marriott Green Tree and one I'll definitely miss - Marriott's Mountain Shadows in Scottsdale, AZ.

(yyzflyer's Top 10 Favorite Marriott Properties)