Revive my baseball card collection

My wife wants to start collecting Yankees sets. :D

I am a single player collector. That means that my collection revolves around a one or more individual players (as opposed to teams or entire series).

I collect Topps Derek Jeter cards. That may sound narrow, but we are talking about a breadth of about 60-90 cards and my intention is to collect from 5-10 deep (duplicates).

I may also add A-Rod or some other player like Billy Martin or Joe Torre.

I think it may be a bit late to collect Yogi Berra, although kudos to those who have amassed cards of the greatest living Yankee player.

I welcome suggestions.