Both of them. Unless it's an intergral part of the game play, I hate stealth sections. That one segment in Arkham Asylum where you have to rescue Commisioner Gordan. I hated that, even though I was a stealthy beast of the night the rest of the game, if it forces you to do it, then it loses it's edge. I prefer it when you CAN go guns blazing into a room and kill everyone in one lift, but you don't HAVE to, that's when I enjoy stealth gaming.
And Escort missions aren't so annoying if they're not overused