I've owned (and used) a bunch of different systems. I have a bunch of Black and Decker 20V tools which I'd classify as homeowner-grade (I killed a drill driver once), but I have a ton of their batteries and they work well for what they are. I have the drill, mini circular saw, two string trimmers, and a hedge trimmer.
My wife bought me a 12V Makita hammer drill which I love, and I picked up a Makita 12 3/8" impact as well, which is also very well made, and just as capable as the hammer drill. As an example the Makita 12V is more powerful than the Black and Decker 20V.
I'm heavily invested in the Milwaukee M12 and M18 platforms, and really like their stuff. My FIL was a contractor who recently retired after 40 years, and I've seen him go through a lot of different tools during that time. His Milwaukee drill and impact driver set he had for a solid 5 years before he left them on his tailgate when leaving a job site, and that was the longest tenure of any tool he owned. I shop the Milwaukee sales on Slickdeals.com, so I feel like I never really overpay for anything. The big 2767-20 M18 impact has taken off multiple Honda crank bolts with easy, and I love the RPM step down feature once a fastener has broken lose. The brushed 3/8" ratchet is also a great tool, and as others have said, it's a much better size than the fuel version. I have my eye on their M12 1/2' right angle impact, but haven't pulled the trigger yet. And my favorite is probably their M12 compressor, I added a standard chuck to it and really love the portability, power, and battery life. Their lighting options (both M12 and M18) are also good and I don't think there's a tool I own of theirs that I'd consider a dud.
I recently picked up a Worx wand-based 720 psi pressure washer that uses their 20V system (two batteries at a time). I bought it with the intention of using it to wash off the cars in the winter (I can use a 5 gallon bucket as a water source with their included water pump), and it works great for that purpose. I hate car washes because I've heard they recycle a lot of their water, which means they're spraying ever car down with a mix of the chemicals they use to treat the roads. Not sure if that's 100% true, but if was enough for me to decide to try something out where I know the water source (my well).
My BIL and FIL both have Ryobi tools and I've been impressed with those, as well. Their cordless brad nailer (typically on sale for $100) is a great tool.
All in all, there are many great options out there to make our lives easier!