Loyalty32, I'm glad you enjoy my site and take it as a compliment you use it as your example of a good player collector site.
www.markgrace.com has been a labor of love. It's pretty amazing I have every one of my 2500+ different Grace cards scanned now. A lot of collectors turn to my site for help with 1990s and early 2000s inserts and parallels. Helps to have a picture of most for reference. Most people don't know that there are some hidden spots on the site, like for instance if you click on the 1998 Topps Tek card, you go to a page that has all 90 pattern variations shown.
If you are a player collector, doing a website for your collection is very rewarding. You hear from fans from all over, and even get sent stuff now and then, or get leads on great cards. I love hearing from fellow Grace fans, and get several emails each month.
I'll add a new site to the list. It's my latest project.
www.collectingzim.com is a site for my growing Don Zimmer collection. It's still in it's infancy, but hope to make it respectable soon.
Vintage collectors may dig checking out my Cap Anson website,
www.capanson.com. While I can't afford vintage Anson cards, there is a comprehensive page dedicated to all his tobacco cards and early issues.