I have to admit that I do that sometimes, but not very often. It usually manifests as thinking, "you know, (game) REALLY needs this feature" suddenly.

For instance:

Romancing Saga 3 REALLY needs more interparty dialogue
Fire Emblem 4 REALLY needs an in-battle trade function
Vagrant Story's hero REALLY needs a character design that doesn't have that stupid antenna-hair and pants with holes over the ass

Then I spend some time thinking of a way to fix it, but it never really hurts my appreciation of the game (okay, maybe FE4, since the item trading system in castles is really clunky and a waste of G).