I just started riding clipless and even with MTB shoes (Mavic Razor) I'll bring some sneakers in my bag. But I found that clipless works best for me when I'm actually out pounding miles instead of commuting. If I'm commuting on my bike I'll throw on the clips/straps.
Same here, I don't commute and did not like straps, esp when riding alongside my road bike friends. I spun out of of the straps going downhill once and straightaway got a pair of Keo-compatible pedals (on the cheap, Outland). I use the same shoe for fixed and my geared bike now. Love it.