My favorite from the wizard list
Lev. 0. Prestidigitation. The ultimate cantrip. Clean, cook, dust corridors to cover your tracks, disguise your odor, makes it awesome.
Lev 1. Mage Armor
Lev 2. Scorching Ray (I use Arcane Study from PH2 and pack metamagic on it) second Rope trick. Never adventure without it.
Lev 3. It's a toss up between dispel magic and fly.
Lev 4. Scrying. I live for scrying. But I like Polymorph for that AC boost.
Lev 5. Wall of Force. For battlefield control. Fabricate, just because.
Lev 6. True Seeing and Dispel Magic, greater. Tons of cool spells.
Lev 7. Teleport Greater, Delayed Blast Fireball, later Reverse Gravity.
Lev 8. Mind Blank, Polymorph Any Object
Lev 9. Time stop, shapechange.