I found that part of the interface lacking, and still make accidental calls instead of sending a text when viewing a contact. However, the extra features are much, much better than any WinMo* phone I've had or the BlackBerry Tour I used for ~3 months. (I carried multiple phones on multiple networks for a while)
With the BB, it doesn't matter which option is shown to be highlighted, one roll of the trackball and you're nowhere near where you wanted to go. And web browsing on that thing? I laughed heartily at Verizon's "browse the best internet" commercials that featured the Tour. EVERY page starting zoomed out and showing a magnifying glass to zoom in, unless you happed to scroll over a link (nevermind that you couldn't see or read what you were accidentally clicking on). Google maps was alright to work with, even though the thing didn't have built-in GPS and missed the marker 75% of the time.
Browsing on the WinMo phones was feasible, but only if you didn't care what the page looked like. Opera Mobile helped a little, but the movement was still way to clunky to be worthwhile. Apple's double-tap zoom to the section is quite possibly the best way to zoom on a phone. In addition, not one of the WinMo phones would be responsive if they were synchronized less than 30 minutes apart. E-mail on the iPhone vs. any WinMo phones is not even a comparison. Apple got it right.
The things Apple got wrong are the things that are fixed by jailbreaking the phone (and I don't mean for free apps). BossPrefs (slide across the top for bluetooth/wifi/location toggles), custom sliders, backgrounds, themes, tethering, battery percentage, and hiding programs that aren't used a lot (e.g. the stock ticker, calculator, etc.). IMO, the iPhone is only worth it if you jailbreak. Otherwise it's just a limited phone with some cool apps.
I've yet to try an Android, but since the re-addition of the multi-touch, it may be a device worth checking out. I love Apple's screen keyboard, but sometimes I miss the sliding one from the Tilt and Mogul.
*My WinMo phones include the Samsung Blackjack & Blackjack II, AT&T Tilt, Sprint Mogul, and Palm Treo 700wx