I am not super fond of reddit and when I post it is always to contribute to the topic rather than ride some one else's case.
That being said sometimes new collectors/players bring it on themselves.
1) I like "X" game - what else to you recommend? For starters what formats can you play?
2) I just got a *insert random console* - what games should I get? For starters what type of games do you like? Lot of genres out there keem-o-sabe. If no genre preferences what criteria are you looking for?
3) *Puts up picture of small lot of, say, Genesis games that seem to have no discernible theme.* What else should I get? Given this any Genesis game not pictured apparently would fit the bill. Give us something to work with here.