The biggest difference I have felt since I switched from Symbian to Android was the availability of good apps. Not crap ones. Not ones which are useless, but good apps. Apps which can be used on a day to day basis and for which I wouldn't mind paying.
In about a month's use, I have already bought 2 really good apps. One if them I'm using currently as I type. And the other is a really good media player. Poweramp is without a doubt THE music player for android. Not only because of its innumerable options ranging from a seriously addictive graphic equalizer to awesomely useful tweaks, but also because of the UI.
The other app I bought today is the android gingerbread modded keyboard. It is available in the market for around $0.99. Something which I'd say is a steal for the features it has on offer. This is without a doubt the best android custom keyboard out there. I'd rate it higher than swype or the default Samsung keyboard it even the other keyboards available in the market. I've used quite a few of them and found this to be the very very best. Kudos must go out to the app developer.
Compare this to the experience I've had with symbian. Nokia had actually sent me an email long back stating reasons of helplessness when I had complained about the inability to download paid apps from the Indian version of the ovi store.
I'm enjoying the android experience more than I'd imagined. I hope my opinion of android doesn't change anytime soon.