Maglite Solitaire is the Rodney Dangerfield of triple a flashlights. So to me, it's nice to see it mentioned in this thread. Trouble is, box stores don't seem to be restocking them anymore. Those LED versions are pretty sweet. No longer several twists to get to a good beam. Twist it on and you get a beam. You can tweak it some but really don't need to anymore.
Microstream is another classic that has held its own over the years and has seen a number of improvements in output numbers. The tailcap button requires a finger tip to activate, but then again nearly every light that small requires a finger tip to activate. I used the punch out circle from one of those plastic rewards cards placed inside the rubber button cover. Works great as it greatly reduces travel length required to turn on the microstream but... also allows momentary to be activated in a pocket carry situation. If you shirt pocket the microstream (bezel down) then great but in trousers you may be surprised to find a dead cell as the light does not get warm in your pocket.
PK's PL2 is a twist head 1aaa that turns on by closing the head opposite of a solitaire that you open the head to activate it. Open/close a second time to get a low beam. Being very over driven this one gets warm and is a fuel guzzler. But with an eneloop pro or an ultimate lithium expect about an hour. With a duracell, eh... maybe 20-30 minutes. Borofloat lens and a kubatan at the other end. It's a thrower with plenty of spill for a 12mm setup.
Bushnell's 20148 is a cross between a microstream and PK's FL2 with maximum grip in mind. It's actually a pretty nice little flashlight. Glass lens, cnc cut knurling and available at Wal Mart along with some sporting goods stores. The beam is a combo spot and flood.
Rayovac has one rated at 3 lumens that used a magnifier tip to make those 3 lumens appear like 20. You see a defined circle of light that works great for close up work or finding the water closet at 2am, and it's shape is not unlike an inkpen so shirt pocket carry feels normal. Oh, and it's $3. It's one of those you keep in the console of the car, in a coffee cup pen holder at the office etc.
Another defined circle light is the 2 for $10 Coast with a tailcap twist to on. Home Depot used to carry them.
Rayovac did a 1aaa Indestructable that was a twist head and came with a keychain clasp. They are still seen at the checkout counter of some box stores.