Magic The Gathering Deck Help?

I have been assembling a deck for a while now and I have won matches with it but it lacks any theme or focus. I feel it is too much a jack of all trades and just not a master of any. I could use some suggestions on cards. Here is what I have.

Lands:

9x Mountain

6x Island

1x Izzet Boilworks

Creatures:

1x Covert Operative

1x Gelectrode

1x Izzet Chronarch

1x Platinum Angel

2x Akroma, Angel of Fury

1x Aven Fateshaper

2x Tidewater Minion

1x Llawan, Cephalid Empress

Instants:

1x Pyromatics

1x Frazzle

1x Convolute

1x Peel From Reality

4x Lightning Blast

Sorceries:

2x Mind Spring

1x Banefire

4x Illuminate

3x Ghitu Fire

1x Wash Out

1x Vacuumelt

Enchantments:

2x Freed From The Real

1x Aboshan's Desire

1x Confiscate

1x Insolence

As you can see I have alot of cards and not many repeats. I can never make up my mind of what to drop and what to buy more of. I only have a few real combos built in to the deck as well. I just took out 8 cards from my deck earlier so I have 8 additional slots to fill as well as organizing my deck better. Can you help?