If you do get an android (coming from IOS), for God sake don't get caught up in all of the voodoo pushed out by (Android and IOS) users alike.
*Take a few minutes to read the quick guide to android (Its a google booklet on the play store)
*Set your phone up properly with a google account/store etc
*Give the phone a few days/cycles to settle down
*Make sure everything is up to date (check the update setting )
*Spend a few minutes going through all of the settings and sub menus one-by-one to get you upto speed as to what and why the phone works
*Remember its not an iphone (ie, you don't need any program to load music etc to it, just drag and drop)
*Set up your google accounts to ensure photo backups, cloud services etc.
*Take advantage of google NOW and "OK Google". Its really, really good (You could install the google launcher of you do like it!)
*Try to use hangouts. Its really good if you give it a chance (the desktop plugin is awesome)
*Enjoy
If it was me, i'd get a wireless charger as well. Use the tech the phone is supplied with! Go and buy a few NFC tags, have a play, you might find them useful (or not).
But really, my first point is the most important. Geeks and nerds like to rummage into the guts of android and start doing stuff to it because they can. Android doesn't need that (anymore) Set it up and use it as Samsung intended.