I see almost everyone here has a portable drill.
I used to have a Black&Decker 9.x volt.. BLAH..
I am now looking for a new one.
What kind do you guys have?
And also, does the drill being 18volt make a difference in the strength and power output that I REALLY need?
Since I assume that we are talking about cordless drills, and unless you are using the tool almost every day, my suggestion is to buy a lithium-ion powered tool. I have a Hitachi DS18DL which I have had for almost 3 years now and it is a very good workhorse drill. On my last birthday my son bought me a Dremel model 1120 driver, a 7.2V Li-on powered tool and I find myself using it allmost exclusively when I am driving screws up to and including 3". It is small, comfortably fits the hand, and for a small tool is VERY powerful. There are a number of good cordless tools out there, buy one that fits your needs.
I was leaning towards the Milwaukee M18 1/2 in. 18-Volt Cordless Compact Drill.
That one sounds good.
I love the Ridgid equipment, my shop looks like a home depot tool catalogue.
That said, i've got:
In addition to my 18 V Ridgid Hammer drill I have:
Ridgid 18 v Li compact drill
Ridgid 18 v Impact Driver (I agree with Geoff, this thing is a monster)