As I promised awhile ago, I went back and watched the "choose their fate" version of Final Destination 3. It definitely adds to the movie. Through your choices (which are actually pretty vague and sometimes very misleading), you will either wind up with slightly different scenes or completely different scenes. In one case, you can actually save the life of a character. I liked the original movie, and I loved that they added this innovation. Sometimes I went back and checked the other option, so it got a little monotonous...but it was worth it.
These are the choices that I remember and the outcomes that you get...
1. When you get to the roller coaster, you choose "heads or tails" - from what I can tell, this only affects which choice the main guy makes...the events still play out exactly the same (let me know if I'm wrong. I went with tails, it seemed to be the same, so I went back, chose heads, and it was the same as the original film
2. When Ashley and Ashlyn go to tan, you choose whether they set the heat to "63 degrees or 67 degrees" - 67 degrees leads to a different death scene
3. At the drive-thru, you get the choice to "honk again or don't honk" - choosing honk again saves Frankie's life
4. Before they go to see the jock, you get the choice to "check photo again or don't" - choosing "check photo again" means a very quick death for the jock, rather than the original, drawn-out scene
5. When Ian is about to shoot the pigeons with a nail gun, you get the choice to fire a "warning shot or kill shot" - choosing "warning shot" has minor differences in the scene, but no important impact (if my memory serves me right...I didn't go back to check the other option)
6. If you saved Frankie's life, you see him again when you are coming out of the police station. You then decide if it was worth saving Frankie "yes or no" - if you choose "yes", you get to see the video that Frankie had been taping. It starts before the night of the carnival and runs through Frankie's arrest.
7. When Ian is about to be crushed, you get to choose if he should "jump left or jump right" - choosing to "jump left" means that Ian will be split in half. Choosing to "jump right" means that Ian will be entirely crushed. I stuck with "left," so I don't know if there is a residual effect to choosing "right."
8. On the subway, you get the choice "check map or no map" - choosing "check map" gives you a difinitive ending the movie. It also gives you another option.
9. If you chose "check map," you will get another option. The frame freezes on a newspaper. I can't remember the exact option, but you can choose to either "read the article or not." - If you "read the article," you will get a definitive ending to the second movie.
The one problem with this is: if you save Frankie, then he should die before Ian...but he doesn't. That is, unless he dies off-screen in the police station...which is a possibility.