I love Angry Birds. It is nothing but pure fun.
So why has every other game I've tried make me want to drink the blood of children?
iPhone games are supposed to make me happy when I am:
**waiting in line at the bank
**waiting for my girlfriend
**surrounded by screaming kids
**waiting for my package to arrive from Amazon
**waiting for the sweet release of death
Are there any iPhone games, besides Angry Birds, that don't suck?

These don't suck;
Broken Sword: Shadow of the Templars (Director's Cut)
Steel Sky: Remastered
GTA: ChinaTown Wars
Ace Attorney Phoenix Wright
Osmos
I know that these are all of ports but that is besides the point for they are great(!) on the iPhone.

Between The Quest and Betelgeuse Brawl, I haven't needed anything for the iPhone. Though the port of Shining Force is quite nice.
Overall though, the iPhone (well for me, iPod Touch) has been disappointing. I use it for what I got it for - music, and being able to check my email at university.

Astro Ranch
Broken Sword
Doodle Jump
GTA: Chinatown Wars
N.O.V.A.
Orbital
Peggle
Spider: The Secret of Bryce Manor
The Sims 3: World Adventures

Awesome! I didn't even know GTA: Chinatown was ported to the iPhone.
I got the iPhone to use for email, quick web stuff on the go, and portable music, but have found that gaming while I'm in the short term parking lot at the airport, or waiting for an appointment, or in court... really appeals to me.
I'll be checking out many of these suggestions. Thanks :-)
(I don't game in court.)
(I'm never in court, actually. I'm not a lawyer)
:-)

HUH?! But Ace Attorney is one of the best franchises out there! Nevermind the realistic court of law simulation, the epicly well written storyline is simply too hard to resist.

Trucker's Delight
Labyrinth 2
Plants vs. Zombies
Jet Car Stunts
Backbreaker
Wolfenstein 3D
Tetris
Space Invaders: Infinity Gene

If you like FPS, there's a sale of id software FPSes for the iPhone going on:
-DOOM Resurrection
-Wolfenstein 3D
-DOOM Classic
-DOOM II RPG
-Wolfenstein RPG
Descriptions here: http://toucharcade.com/2010/08/12/quakecon-2010-begins-all-id-software-iphone-games-on-sale/