I find the cordless aspect to be indispensable, I would never want to go back to corded tools for things like drills and my reciprocating saw. Cords are a pain, they never seem to be long enough, I hate untangling them and rolling them back up, it's just a hassle. I can take my cordless drill up into the attic, out into the yard, on a boat, in an RV, in a car, anywhere without thinking about having a place to plug it in. I use my cordless drills and screw gun the most often, then the reciprocating saw. I haven't had any trouble with the batteries either, as long as I use it at least once every few months and charge it when I'm finished it's always ready to go. I had the battery packs for both of my cordless drills rebuilt about 4 years ago, they were around 10 years old at the time and were getting tired, the rebuilds are still going strong. My circular saw and router are corded but those are both tools that really need to be powerful and I don't use them all that often.
Next on my list is a cordless string trimmer, I have an electric one that is a big pain to drag the cord around, and a gas one that I spend more time screwing with the carburetor than I do using it. Looking forward to getting rid of both of those. I got a cordless electric lawnmower a few years ago and I love it, that was another tool I was spending more time fixing than using, I have a small yard so a gas powered mower was overkill and plug in electric mowers are a pain to avoid tangling or mowing the cord.