When it comes to power tools I usually go with the new stuff.
Now like intsance about the eggbeater I wouldnt use mine. It works great and all but I can bring my cordless an do it just as good,just as quik. I have a small 12 volt an a normal 18 volt witch works for most jobs. If I need to Ile break out the 28 volt cordless we have at work(my cousins my boss and doesnt mind if i borrow tools) Rarely exept for boring large wholes an drilling multiple wholes in concrete will I use a corded drill. With the new lithium ion batteries I use those. I have several batteries so I just change em out as i go. by time ime done with one battery theres still 3 more full an one on the charger. I never run low on batteries.
For hand tools I use my older tools the perfect handles, adjustbles, folding rules, etc
I love my cordless drills, and pretty much use them daily. But I have to say that hand drills and braces do some things better. Especially if you're restoring woodwork, you often have to really feel what's happening at the end of the drill. Can't do that with any electric drill in my experience. I have hundred year old center bits -- they do things no twist drill will do, so I use them.
When I was building sets, I was using my cordless 8 to 13 hours a day. Spare batteries are the only way to go. I always kept three on hand, because it was possible to use the battery up in less than an hour. I still carry at least one loaded spare battery, and make sure it's full of juice the night before.
Just about all my old tools are my favorites. Each one does some job better than any other.