Protoss strategies: immortal vs. Dark templar. Which one do you use more in Starcraft?

[Noobslayer]

Picking between immortal strategies and dark templar can be a hot debate when it comes to playing Starcraft. Both strategies have their pros and cons.

While immortal strategy can provide you with being better I'm defensive situations, Dark Templars is great when you want to play aggressively.

Which one do you like using?