What features make a game a TopSelling game, and what bugs break them?

ive been hearing alot about videogames lately good and bad and im just curious what makes or breaks the best games these days?

P.S. any and all feedback appreciated

Lets set Sonic the Hedgehog as an example.

Everyone first though it was good because there were so many trailers of Sonic going super fast and stuff plus some retro junk in the trailers.

Soon when its release. It's a glitchy mess where in even if you walk 3 steps, you die.

Its always the trailer or the license that really brings up the hype in games of today.

IMHO, what makes great games is a combination of orignality, prolific use of the engine, compelling story (for singleplayer) and great use or voice acting/Sound Effects.

The things that break great games are obviously bugs that don't get patched for months, online lag (for multiplayer), erratic FPS (frames per second), carrot on a stick mechanics, linearity, unlikeable characters, unpolished features, shipping delays, no marketing, boring set peices and unoriginal gameplay.

As long as a game is still fun to play I can look past alot of bugs, although as soon as there's either a showstopper bug, or I just hit something that completely takes away the fun factor, then that game is broken for me.

Good:

Engaging story that's well written,

Decent game play.

Bad:

Poor optimisation,

Bad voice acting,

Show stopping bugs (crashes to desktop etc).