Windows Phone 7 is the only other major smartphone OS I have never owned. I've owned Symbian, BB OS, iOS, webOS, and now currently checking out Android. I am also looking forward to RIM's QNX when they start to become available for phones.
For at least one day, my experiences with Android is not bad at all. I assumed far worse than what it really is. On 2.3.6 Gingerbread and rooted, and this near 2-year old phone is fairly smooth. We will see what that is like a month from now. Perhaps it gets a bad rep and the "laggy" comments get overblown which is no different with other OS-centric websites. So far, I haven't seen the lag or perhaps I am not as OCD like before to even notice a split second difference when scrolling or in multitouch. And about 80% of apps from my iP4, I don't really use and most of the essentials can be found in the Android Market as well. Like that quote from Forrest Gump - "Now, Momma said there's only so much fortune a man really needs and the rest is just for showing off."
I still think Apple has the best ecosystem, stable, and the apps still are better made, If you are too invested with them, stick with them. But there are some nice advantages too with Android like widgets to look at info at a glance and phones offering a expandable memory slot, varying designs, and removable batteries. These phones can be used for a long, long time and not forced to pay $80-$100 because the storage is running out or the battery needs replacement. Apple for the 3rd straight season since 2009, they will charge you $100 just for another 16GB and 32GB of space when microSD cost $15 and $40. So for three straight gens of iPhone, you get the same screen size since 2007 but you also get charged $299 for a 32GB model. Compared to Android phones at 16GB on sale for $99 or less and then adding another $15 for another 16GB microSD. That is a savings of of over $200.
To me, Android might seem like a Trojan horse just for Google's ads, but understand Google also has to deal with the manufacturers' own shortcomings. They can't control the different specs that come out. So it is much harder for them compared to Apple to cater to every phone with varying specs and skins on them. I just like that Ice Cream Sandwich is going to support many older phones. Android isn't as bad NOW compared to their Cupcake and Eclair days. Alot has changed since. Much more refined in the Gingerbread era.