The same goes for me being very disappointed. I had the Captivate, S2, dad has S3, wife has a Note 2 and all have been good phones. I love my wife's Note 2 but can't deal with a phone that big. My biggest problem with the S4 is the battery life mine is getting. I can barely get more than an hour screen time. Right now my phone is at 15% with 1:20 screen time that accounts for 40% of the battery after 10 hrs unplugged. I'm tired of constantly tweaking roms, I just want a phone that works all day without me having to install a custom rom.
SGH-I337 Galaxy S4
SGH-I317 Note 2 (Wife's)
SGH-I897 Captivate Serendipity 6.2 (Son's toy phone)
SGH-I777 SGS2 Rom - AOKP JB Kernel - Siyah (Retired)
Atrix (wife's) (Retired) Stock Rooted