@Don, I knew I could not express it correctly. I said "not worth collecting", but it doesn't mean "not worth to own them".
Collecting, in my language, has slightly different definition. We should spend time (to search, reserach) and efforts (maybe negociate with the former owner) to get an item, it is called "collecting" in my language. If I sit in front of the computer, hit the keyboard, and get an item after 2 days, it is called buying.
It is still true to say there were not many decks produced in '90s worth collecting except: Holiday/Santa Backs, 1996 Olympics, '92 and '95 Tall Stacks. What else? As for decks produced after 2000, some of them are wonderful, but it is not diffilcult to get those decks. I have many of these decks, I just paid and got them. I don't say I "collect" them.
This might be off topic. I like many modern decks, they are beautiful and have good quality. However, I only buy those I like instead of all decks produced in these years. I've seen many so called collectors buy every newly released deck, normally buy 2 decks -- 1 for collection and 1 for use. I respect their choices, but it is not my way of card collecting. Maybe they want to build a museum of playing cards in the future