lv2 to 26 in a day on my titan, almost got 3 nightfall ready characters now 
I definitely prefer the titan to the hunter in PvE but I still think the warlock beats it. The melee attack on sunsinger is brilliant and the self res is just too useful for raids and nightfall.
Something I wasn't aware of that's useful for people making alts:
On levelling your second character you can change class right from the start, you don't need to be lv15 like you do with your first character. I wouldn't have noticed this if it wasn't for another titan in my strike group who had access to the bubble at lv7

I definitely prefer the titan to the hunter in PvE but I still think the warlock beats it. The melee attack on sunsinger is brilliant and the self res is just too useful for raids and nightfall.
Something I wasn't aware of that's useful for people making alts:
On levelling your second character you can change class right from the start, you don't need to be lv15 like you do with your first character. I wouldn't have noticed this if it wasn't for another titan in my strike group who had access to the bubble at lv7