Cooking with the S4 (hot phone!)
I am surprised at how hot this sucker gets. This morning, using it via WiFi to answer emails and I can feel the heat rising through the screen. I would not say it is uncomfortable to hold at all, but this phone is kind of toasty.
My Moto Androids ran very warm too (especially the Droid 2G). With my Droid 3, I found that adding an extended battery helped.
Anyway, I hope this is not going to be an issue.
Last night, I was out with a buddy who has an S3 and I asked him if he liked it. Interestingly, his main complaint was heat.