I like it! This is a very and pretty decent casual deck, please don't take this further then that, you'll be very sad. Unfortunately, that's the lot of dragons in MTG.
Alrighty, deck tips. We be ramping, don't keep a hand without ramp. Dragonlord's Servant and Orb of Dragonkind are preferred early game as they can get us playing a 4 drop a turn earlier. (if they stick) Rivaz of the Claw helps us dominate the late game, letting us re-use all of our dragons, tapping for 2 to help us cast, and is a decent body.
Don't be afraid to sac things to Imersturm Predator, it gets pretty big pretty fast and is pretty effective graveyard hate. Though, because we're running Dragonlord Kolaghan, if you're planning on playing her be careful what you exile. You don't need to exile anything to get the +1/+1, so maybe leave those more common cards in the 'yard.
Decadent Dragon is kinda a sleeper pick, it helps us hit our land drops and if nothing else, steals the opponents cards forever. It's quite annoying for them, after using it the people I played against where very concerned about what I had stolen for the whole game.
We've got a ton of removal, cause let me tell you, we aren't doing anything early game. The sideboard is basically just more removal, most importantly more board wipes. We have graveyard hate, (Go Blank) some discard, (Thoughtseize) and The Stone Brain if we run into combo.
