You need to focus your concept a bit. "Wizard" is usually not a narrow enough concept for the Wizard class. What does "Being a Wizard" mean for you and the character? For instance, if you want versatility, you can get more as a Gnome Illusionist / Summoner. Also, by taking Expanded Arcana at every opportunity, you are really denying yourself a lot of good feats--particularly metamagic feats, which the Sage bloodline is adept at.
That said, you have a pretty solid starting point.
- Get (Greater) Shadow Evocation/Conjuration.
- Stay away from spells you will only cast once per day (Rope Trick, Mage Armor, etc).
- Get Communal Mount A.K.A Wall of Horses.
- Nix highly situational spells like Feather fall--use a scroll instead.
- Have Sleep from level 1. Trade it out when its no longer useful.
- Have Stinking Cloud from level 6.
- Have Haste from level 7 unless someone else has it covered.
- Unless your build is different from the norm, stay away from offensive touch spells like hideous laughter.
- Look into Blood Money and costly material components. I haven't done the research yet but it looks promising.
- You have a lot of summoning spells, and early. Make sure you're a player who can responsibly use them without dragging the game down.
- Trade out spells, like Summon Monster, as they become obsolete. You generally only want two levels of Summon Monster.
Remember that there are items to expand your spells known now.