death animation: camera shake, camera starts panning up, duration ~ half a second, only after this is over switch into 3rd person view
display window with following information
what you have done in your lifetime:
-- number of kills
-- momentum gained
-- calculate a score / points
-- give extra points for killing players who scored a lot of points in their livetime themselves / for taking out good players
-- give extra points for dealing damage to a player who gets killed shortly afterwards, ponits depending on damage percentage
-- give extra points for taking out high level enemies (the bigger aliens etc.)
show model of player that killed you, the name and the weapon he was using
show healthbar of player that killed you, extra infuriating if its 1 percent
show name of player who assisted and damage percentage
All of this will give the player a sense of achievement instead of negative feelings about respawning.