Do you play with special characters?

[Popsical]

I use special characters in 3 of my 4 armies i own. Why not.
Astral claws: lugft huron is such a fundamental figure for them that it seems less approppriate not to use him.
Sisters: celestine is probably your only hope of competing at all in melee.
Grey knights: i built an adeptus custodes list so draigo lets me use paladins as troops and these guys are the only guys fit to represent the emperor and his custodes.
Tyranids: i dont use any of them, the dooms too eratic and the pornlords save isnt as good as id like.

Broken units? The vendetta. Cheap as chips and reliable. Units must be able to reliably influence games to a winning conclusion to be really classed as broken.

[DarkLink]

Well, you can also take the Vendetta en masse. Same thing with Necron flyers. Flyer rules are terribly imbalanced, so any flyer you can spam is game-breaking unless you're facing another flyer spam list.

[Popsical]

True. Most fliers are pointed highly so spamming isnt so bad. As you say the vendetta and some cron fliers are so cheap that it causes massed spam issues to break games before they begin. Im not sure where gw are going with the game at the mo. Unless they start to produce anti air units to counter flier spam then the meta will be very one dimensional for the foreseable future.
Im not a fan of the latest flier developement myself but hey ho grin and bare it.