I've not installed any games yet, but I imagine once I do, the space will begin to go quickly. Music I'm less worried about, I stream mainly from YouTube etc. Video recording will be interesting though.
I would have preferred an SD card option, just because it's a fallback. An SD model would have probably convinced me to go for an 8GB N4, but no SD meant I had to go for the 16GB one.
The lack of OTG on this phone is a worry, but at the end of the day, considering the relative ubiquity of WiFi/3G internet in most developed countries, I don't think it's a big problem for streaming video, music etc, so really it's just games and what not that might be the struggle. I'm thinking of setting up a dropbox, (First time for me) which would be good for videos, and music and what not. I'm just not convinced of the price thats all. 2GB isn't very much, and as I have a pretty unlimited web server I could take advantage of that.