Yes, I will be sticking with an iPhone. I've had an iPhone in my pocket since 2007, and I don't plan on stopping now. The iOS platform, and the iPhone in particular offer many advantages to me at this point:
1. Familiarity. Whereas some people say that the UI is stale, I say that it is stable. Many of the operations that I do on my phone are done without even looking at it; the actions are muscle memory at this point, having used iPhones for so long.
2. Applications. The iPhone still has the strongest application library in the market, and I have a fair investment in iPhone applications that I would rather not abandon.
3. Upgradability. I have owned three iPhones; the original, a 3GS, and a 4S. My original saw three major versions of iOS, my 3GS is on its fourth major version, and I can easily see my 4S being supported by software updates for another two years or so. Some user-centered features may be left out on older hardware, but all of the new developer features and APIs always come to the older devices, ensuring application compatibility. No other platform delivers updates as reliably as the iPhone. Every supported device gets the update on the same day.
4. Media. I listen to music on my phone quite a bit - the ability to just stick it in its dock and sync all of my media in iTunes in one go without doing anything is wonderful.
I used to jailbreak my iPhones regularly to get the features that I wanted, especially in the 1.x and 2.x days with my original iPhone. However, I haven't felt the need to do so with the more feature-complete iOS versions that have come about recently. I love the platform; I would love some new features (Apple, Weather has been telling me that it's 73F and Sunny for nearly six years now), but overall I still enjoy my time with the platform.