Cars come with all kinds of features these days. There's almost nothing you can't get as an option. From parking assistance to motorized cup holders, modern cars have the works. 

But what is the most important feature? Opinions vary. However, The Atlanta Journal-Constitution's Gridlock Guy make a strong case for standard air conditioning. Here's a quote:

We are hopefully entering the tail end of one of the hottest summers in recent memory. Day after day we have seen the temperature rise north of 90 degrees in the Atlanta area. Unfortunately for many metro commuters those 90-degree temps are still a factor, smack dab in the middle of their drive home from work. For these sweaty drivers, air-conditioning in their vehicles has been the only thing keeping them sane. 

Check out the rest of the article, Gridlock Guy: Is there an auto feature more important than AC?, and decide for yourself.