I've waited longer before to buy games on disc instead of digital. Zelda Windwaker HD for example.
I've paid more before for the physical release $68 vs $49 for DriveClub for example.
I always get the extras with the disc version, yet wouldn't miss the extra skins or starter money if only available digitally.
I buy smaller games digitally, although some I have bought again when released on disc like the Jourrney collectors edition. I like to have a selection of great games on my shelf, while having the ability to sell the ones that aren't keepers. Once digital releases are at least 50% off and have the option to upgrade to a physical version (pay an extra fee, get the disc mailed), then I'll buy digital.