I bought two LED bulbs to do a trial run for possibly switching to LEDs. Above is a picture of the new LED (left) and the old dingy incandescent (right). FYI, I used Sylvania 168/194/2825 LED (purchased on Amazon).
Call me crazy, I prefer the soft warm glow of incandescent to the harsh cool light of LED. There are some newer LED now with warmer light, but they're still too bright for me.
We like 4000K LEDs in the dome/map but stock incandescent in the mirror/vanity lamps because, well, vanity...
Okay, you're crazy. Haha. But to each his/her own. I switched to CFLs (and LEDs recently) in my house long, long ago to save energy and because I hated the dingy yellow light. Same goes for the car.