CapnZapp
Legend
I think ambushes are annoying and usually unfair to the players.
They're annoying (especially in 3e where pre-buffing is critical) because the PCs don't have time to prepare for them.
I think an ambush is the best way of conveying the fact the BBEG see you as a serious threat.I think ambushes are an adequate storytelling tactic because they convey to the players that hey, the bad guys see you as a serious threat. But there are so many other ways that could be conveyed that don't involve ambushes. Such as:
* bad guy attempts to bribe PCs to stop attacking him or to go elsewhere
* bad guy tries to get the PCs to work for him
* bad guy uses some other person/group as a cat's paw to fight against the PCs
* bad guy packs up his things and abandons his lair, leaving a taunting note for the PCs
* bad guy is so scared that he surrenders rather than face death (not every bad guy has to fight to the death or be an insane cultist)
Those other methods are fine too, but not if overdone. Then the players get the feeling the BBEG (and by extension the DM) isn't really out to kill them.
Now, if you're playing 4E, you're in luck. Ambushes are much less unfair now than in the previous edition.
Not only do PCs not need to pre-buff, they will manage even if without their stuff, and hopefully the ambush means they'll be fresh out of an extended rest. Also, there's none of the scry-teleport silliness, meaning that the ambush doesn't always come straight out of the blue like in 3E, and when it does, the party can usually recognize how they should have protected themselves better.
All good. And all factors encouraging you as the DM to really take off the gloves! Assuming the PCs get ambushed because they made a blunder earlier, they will 1) survive even a nasty ambush 2) thank you for it, because they see they deserved the hardship 3) lead to a better adventure 'cause now it's personal!
