I have a number of autographed photos and baseballs...
Some HOFers, I have... Bob Gibson, Ralph Kiner, Ferguson Jenkins, Bob Feller, Eddie Murray, Rollie Fingers, Harmon Killebrew, Frank Robinson, Tom Seaver, Dave Winfield, Don Sutton, Tony Gwynn, Vlad Guerrero, Trevor Hoffman, Bert Blyleven, Rod Carew, Mike Piazza, George Brett, Frank Thomas Albert Pujols (future HOF), Mike Trout (GOAT)
I also have some who are a far cry from the HOF.... Trevor Reckling, Brandon Wood, Dallas McPherson, John Mayberry, Jr., Gary Matthews, Jr.
Some favorites and other notables... Raul Ibanez, Edgar Martinez, Garvey/Lopez/Russell/Cey, Billy Wagner, Jimmy Rollins, Don Newcombe, Andrew McCuthen, Ryan Braun, David Wright, Michael Young, Scott Rolen, Kirk Gibson, Orel Hershiser, Mike Cameron, Eric Young, Jake Peavy...
Some favorite Angels auto's... Joe Saunders, Jered Weaver, Tim Salmon (most everyone from 2002 team), Kendrys Morales, Jeff Mathis, Torii Hunter, Mike Napoli, Doug DeCines, Gary DiSarina (don't tell IP), Kelvim Escobar, Ken Forsch, Eli Grba, Bobby Abreu, Mark Langston, Paul Byrd, Jim Abbott, Chuck Finley, Howie Kendrick, Mike Scioscia, HIdeki Matsui, Juan Rivea, Kirk McCaskill, Orlando Cabrera, ...
I even have Nick Adenhart.
I have somewhere around 200 signed baseballs, tons of photos, tickets, etc. I always tried to get photos personalized. Never looked at this stuff as an investment - pure hobby.
Some autos I don't have, but would like to get... Troy Tulowitzki, Evan Longoria, Nolan Ryan, Shohei Ohtani, Ichiro, and I'm sure there are others.
Many of the autos have a story tied to them.. and that was the fun part.