I've been using Android full time for the past few days, first ICS and now today JB on a Galaxy Nexus and I could probably ramble on for quite a while about my first impreessions but I'll try to briefly summarize why I won't switch over full time to Android. There a a lot of things that I like in Android and can certainly understand the attraction that leads many to prefer it--customization and flexibility alone are far ahead of iOS. Android devices really are far closer to being fully functional handheld computers than an iOS device. The problem for me though is they falter inside an Apple ecosystem and I have to sacrifice too much functionality in this regard. I'll try to explain:
1). Poor integraton with iCloud. Our home has 7 devices sharing information via iCloud and out of the box Android cannot replace this functionality--I had to use two third party apps for Calendar and Contact syncing and there is no automatic syncing via push. I know I can use Google services but don't want to have to reconfigure 6 other devices to do so. I also lose Find My iPhone functionality and can't sync my reminders.
2). No AirPlay. We haveTVs scattered throughout our house and use AirPlay quite a bit, either to share video, music or play games with my kids. Also, no Remote app. I'm sure there are third party apps in Android that my work but not as well as Apple's app.
3). No iMessage. I use this a ton--most of my messages are to other Apple devices so it's allowed me to keep my grandfathered text plan of only 200 texts/month. My daughter and son also send me messages via iMessage from their iPod and iPad.
4). Cost of apps. I realize this is my own doing living in an Apple world for the past few years but switching to Android would necessitate repurchasing a lot of apps.
5). A bunch of little things--don't know another way to explain it. First is just the feel of the OS and the apps. On iOS everything just feels and looks better. Any of the apps I've used on both systems just feel more polished and sophisticated on iOS--only way I can really explain it. Another example--switching audio output on the iPhone is a breeze. Doing the same thing in Android requires that I shut off bluetooth and then restart it.
These things alone outweigh the advantages offered by Android for my specific needs. I won't deny that Android offered greater overall functionality than iOS but it just doesn't fulfill my needs as well. I'll continue to play with it over the next few months until the next iPhone comes out but don't anticipate a full switch. Just my $0.02.
So basically, you're just saying you're already entrenched in the Apple ecosystem.