or any other player/former player that is tough signer for certified autographs (or even overall tough in signing).
Sorry for being old school (though I might not have budget for any of these anyway even if Panini makes them).
Currently collecting (basketball only): SkyBox Premium Autographics (1996-97 to 1999-00),
Stadium Club Co-Signers (1997-98, 1998-99), Topps Autographs (1997-98 to 1999-00),
Panini Private Signings (2010-11 onward), HOF on-card autographs, and anything that catches my eyes.