Corded vs Cordless Drill
Go to any site where they are building homes.  80-90%+ of drills there will be cordless.   Until the past 5-10 years most consumer cordless drills were almost worthless for heavy duty jobs.  But that simply isn't true anymore.  The big boxes carry good brands and you can get more than enough power from a $200 cordless drill that comes with two batteries and a charger.  

The downfall of the corded drill is you need electricity.  I would say 1/3 of the time I am using my drill I have no or poor access to electricity.  If you are drilling on a bench next to a socket then this shouldn't concern you.  Also if I am working around a house it is rather annoying having to plug and unplug drill or keep it from getting caught on something.

I have a corded drill.  It has two uses.  I use it when I am mixing cement/thinset or something similar.  Doing this with cordless isn't a great idea.  The other is when I forget to charge my batteries.  

Note: one negative is that I misplace my makita almost daily.  Doesn't happen with corded.  But then kids don't get to play "find dads makita".