Never played another world. what's wrong with Myst?
well the thing about flashback is that it wasn't necessarily too short, although it was short, 10 hours sounds like a good estimate (there are cheats for that game? besides level passwords?, it just felt like things really didn't develop much... The gameplay really wasn't good enough to really call it something you'ld play just for the fun of it once you knew how it went and how to get through the puzzles, which there just weren't enough of (see Myst at the top of the list?

). The last stage just felt a little too much like the first to be any higher than 8th. If it had any replay value, the length wouldnt matter, but it doesn't. Besides, 8th is a good place to be!
A good rpg takes about 25-35 hours, otherwise it risks getting way too long, but a few more hours are alright if the story needs it. Still, i've never spent more than 47 (original suikoden, it just dragged on and on....i just checked my memory cards since you got me curious). 10 hours is a breeze for a story-driven game.
The way i see it, to have a good story, a videogame needs nearly ten times as much time to tell it as a novel, because the other 90% is spent with playing the game or reminding unattentive players what was happening. I read the grapes of wrath in 3 hours, and it was fantastic, so that a good game could take 35 hours seems pretty reasonable.
Also, i play very few games that don't offer either good strategy or good story. I hate all shmups i've ever played, sidescrollers too except sonic (and i guess flashback, it's sidescrolleresque), i don't even like mario or metroid.
another game that should be up there is Homeworld, which managed to have both strategy and storyline. The only real annoyance was the lack of terrain (it's in space afterall). Strategy suffers a bit when there's only formation, no plain of battle or obstacles. Everything is dogfight dogfight dogfight or "let's watch the frigate-line".
Does anybody but me like a good wargame?