I have the Samsung Galaxy S3 - I love it, it's amazing. Huge screen and more features than you could shake a stick at but it is my first smartphone so I've nothing to compare it with.
Yes I would, I have the galaxy S4 and prefer it to my sons iphone not cheap to repair the screen though if you drop it like I happened to do and cracked it
I have a galaxy note, OK its a very large phone but takes great photos, I love it. I wouldnt touch an iPhone with a barge pole, it is just a fashion accessory for teenagers.