It's because game developers have to cater to different android phones, so they could not tune the graphic too high as some phones may not able to support them.
For iphone they can just make the graphic the best as they only need to support 1 type of phone.

The graphic looks really dated.
However did you tried playing it on your phone yet? Because sometimes the screenshot posted in the market is of low quality due to downsizing of picture.

Chainfire 3D basically solves all game compatibility problem in our phone, try that.

My opinion (no offense intended)
To be honest, gaming on mobile phone sucks, if you are a gamer you should buy a good PC/Xbox360/PS3 instead and enjoy the brilliant graphic on a big screen.
It's all about the control, touch screen control sucks for these types of games, especially FPS.
For mobile game/touch screen game like Cut the Rope is enough, for me at least, and it works well.

I'm telling from personal experience. GS2 is not so good for gaming as it gets hot quick fast, the screen become barely touchable after a while (depending on games).
I played Nova, Asphalt, Shadowgun, Spiderman, Samurai Vengeance and so on, all heat up.

Sorry for the long post, for those who want to use controller for your phone, download sixaxis controller from the market.

Heat on the back of the phone is not a big problem, but heat on the place where I need to place my thumb on it is a problem. Why play game without comfort? Game is for relax and releasing stress.
Yes that is my point I'm telling people who tend to buy phone just to play game. I got a PSP and PS3 so SGS2 works as a smartphone for me like web browsing and email.

Chainfire3D is an app, it works like a graphic drivers on your phone, it can help you to play game that is restricted to Tegra 2 devices or games which your phone's GPU is not supported.

I get Asphalt 6 WCG version from Samsung Apps last time which it was free.

The Samsung 2000mah battery comes with a back cover which protect the camera lens as well if that is what you want.

I bought some apps from Market using cc in phone. Every time after I done my purchase I will delete the cc information on Google Checkout.

It is because in Android Market there is no need to re authenticate your card during purchase, this makes me feel very insecure. Normally I buy stuffs over Internet using cc I will receive a SMS for verification purpose, but purchasing apps through Android Market doesn't.

Just don't save any passwords, anyway no matter where you save it is not safe, store it in your brain.

Maybank VISA debit card, every time I purchase something throug Internet using PC (like GSC ticket) I will need to go through VISA verification process, which they will send a code to my phone and I need to key into that page to proceed the payment. However when I use the same card on phone's Android Market (Google Checkout), I don't need to.

So I always delete my bank details after each app purchase, or else imagine some day people take your phone and keep buying all the apps >.<

I have more or less same battery life like yours, using CheckROM RevHD 1.0 with Siyah 2.2 beta 6 without any SetCPU configuration. The kernel is really good, 2.1 version freezes my phone some time.

What is the ROM you are having now?
Did you just flash the modem file of XXKI1?
You need to tell what you did before your baseband changed toXXKI1.

I got pretty good battery life on CheckROM RevHD 1.0 + Siyah 2.2beta6.
1day21hour on battery, 3hours50minutes Display on and still 10% left.
Moderate gaming/browsing.

When reporting your battery make sure to include display on duration, because maybe you didn't use your phone at all

Is yours the cherry one? I use that one to buy apps form market no problem
It can use for many other websites to purchase things also since it is a VISA.

The version number remains unchanged, they just add in the Google Music in it.

You have to manually add pictures to your contacts again, whatsapp only show contact picture if you added them manually in contacts. You flash CheckROM with wipe that's why all the contacts pictures gone.

To make things easy for you, just flash the WIPE version which will delete all your data and wipe cache.
You can also do it manually.

Wow we are going to V20.
Soon we are going to catch up and surpass Galaxy S thread!
A recommended app for today: vscreens by Sony Ericsson

https://market.android.com/details?id=com.vscreens.android

vscreens lets you easily view and show your pictures on a larger screen

vscreens by Sony Ericsson lets you easily view and show your pictures on a larger screen. Open http://vscreens.com in a browser on you larger screen and pick the picture from the vscreens application. Scan the code on vscreens and you are connected.

Try changing back your Modem only to KH2, maybe KI2 modem is not so good for you.