Most of mine are the 'wrinkle free' variety that actually work pretty well. I have a few 'nicer' shirts that aren't and you learn the tricks of the trade - hanging it near your shower, wiping with a hot wash cloth, not drying completely, etc. Irons are a hassle and I rarely use them.

Still, I rarely wear those for that reason. They also look like crap at the end of the day from sitting in cars or padded chairs.