What a strange question. Perhaps you don't create and/or modify any playlists (?). I have tons. [but —beyond music —all sorts of stuff (contacts, events, bookmarks, notes, apps, etc.) gets synced.]
Yes, syncing all those things is great, but being forced to sync through iTunes only is not exactly the best scenario. I'd rather there be an API that allows anyone to write a product that syncs with the device. Being able to sync over the air would be nice too, especially without having to subscribe to the mostly superfluous MobileMe.
Hell, I was glad I could sync my contacts and calendar over-the-air with Google (via the iPhone's MS Exchange support) instead of having to do by connecting my phone to a computer and using iTunes.
Uh oh, it's one of those "I like to
drag and drop my music files to my device the ancient WinAmp way" guys.
Probably prefers vinyl records too.
I'm not against syncing, I'm against being forced to use iTunes only. And I actually thinking having to physically connect to a computer to sync is backwards, there needs to be more over-the-air syncing.
I did like WinAmp 5, back in the day, but ditched it when I switched completely to Linux and started using Amarok. I was able to sync my iPod with Amarok at the time and it was nice not being forced to use iTunes for this. (I know you can now sync iPhones in Linux now, but it took some hacking for them to get that working)
Android has the advantage here. You are not forced into one particular model of syncing. You don't even need a computer to use an Android phone.
I'm not saying that iTunes is a terrible product or anything. It works quite nicely. But it doesn't work exactly how I want. And as a software developer, I could write an app which does, it just wouldn't be able to reliably sync music with the iPhone. And it's not like I could write an app for the iPhone that syncs with my app, because it would duplicate functionality and Apple would never approve the app.
Oh, and I'm ready to ditch my vinyl collection and my 3 turntables. However, my girlfriend isn't

At home, we mostly listen to music streamed from iTunes to an AirPort Express.