I'm a newbie to all of this, but I have to admit, some of these lights really look cool! As far as from what has been posted so far, I'm liking the Streamlight ProPoly 4AA Luxeon. It may not be the sexiest light I've seen, but it seems to be cheap, long lasting, and not too difficult to find batteries for (or rechargables, as mentioned)!
I kind of like the ability to use batteries that are cheap or rechargeable. I found these forums after getting sick of my cheap lights dying on me when I really need them. I figured I'd do a little research this time and get something that will last me!