Windows Phone doesn't do any of the "contacts fishing" you described.

As for the contacts themselves, you pick which accounts (email, Facebook, etc) show up in your contacts list, whether to filter out contacts w/o phone numbers, and whether to sort/display first/last or last/first.

And that's about all the options there are for contacts. Some folks coming from Android may find the lack of options problematic but I've become a fan of the streamlined approach that eliminates the need to explore every nook and cranny of options menus to get things set up "just so". That's not to say that WP is dumbed down, it's just designed differently from Android, with an emphasis on different things.

On WP you can avoid updates if you want to, but so far you pretty much never want to do that.

The difference in size of the app stores can be an issue -- depending on what you want to do. What apps do you use most?