I keep a little 13l Fenix EO1 on my keychain for small stuff like poking around bikes or under the desk or whatever. I keep a 300l Ultrafire in my backpack already, and with a light that bright I was getting annoyed using it in small spaces or tents. The EO1 has been a great daily-use light, while the Ultrafire just gets used if the power goes out, walking in the woods at night, etc.
I ordered that NiteIze kit for the AA Mini Mag that lives in my toolbox, hopefully it's a nice as they say. I like using the Maglite, and it was a gift so I could never get rid of it, but it's just so anemic out of the box.