Um, actually... even Blasters have identity crises, i.e.: ranged DPS versus blappers. The identity crisis is actually "baked in" to the AT itself, with most secondaries including melee attacks. It's been said more than once that Blasters are a "damage" class, not a "ranged damage" class, and that anyone who plays a Blaster as ranged-only isn't really playing a Blaster properly.
Guilty as charged: I prefer my Blasters ranged-only, and it's also one of the reasons why I like Sentinels, too. As a Blaster, I have to decide to skip those pesky melee powers to grab more mitigation from elsewhere, like power pools. But as a Sentinel, I'm free to be me -- ranged only primary, mitigation secondary. If Sentinel damage wasn't so anemic, I'd never play a Blaster. However, because Sentinel damage is so weak and difficult to improve, I end up playing Blasters with augmented mitigation, because it's easier to make a tanky Blaster than it is to make a blasty Sentinel.