Its fun getting away and getting that "invincible/immortal" spam. It gets peoples attention so they'll end focusing on you rather than the ball carrier. I have one Op on my server that always guns for me(and is horrible with BM gear to my cent/champ), you can really get people worked up.
If you jump someone at full and don't have your flash grenade to get away you deserve to get AOEed or stealth scanned.
Roll a stealth class, you'll love it but it will spoil you. Having a stealth pause button and being able to skip mobs is awesome among pretty much being ungankable.
I knew I was going stealth an heals after playing a Druid in WoW for years. And seems things will be just the same, least played most nerfed class.
Come to the Darkside, we have cookies.