Long missions? Yes, those are fun.
Except for this one I played in Inferno (which overall, I though rocked) where the mission is twenty minutes long, and the last two minutes are the hardest.
Thus, you die, you start all over, and have to make it through the eighteen tedious minutes to get to the last two that are the most new and intense.
And what if you lose again?
A good example of a classical long mission:
The third mission of Freespace 1. Escorting a convoy...some weak Vasudan attack craft jump in...pop em' easily...everything looks good...suddenly...SHIVANS! HOLY CRAP! EVERYONE'S DEAD! I'M GOING DOWN! MAYDAY! MAAAAAYDA--eagrttyjaaaaaaaaaaeeeeeeeeee
*Contact Lost*
Very well done. Good point, Setekh.