I like one of Uni's fatter alpha-gel pencils much more than anything from the kuru toga line.
I keep falling in & out of love with wooden pencils. Much of this stems from my demands: I want the feel of a pencil but darkness and fluidity to approach pen as much as possible (BP/RB/gel). I also write with a very light hand, and hate the feeling of a dull pencil on paper.
On a good day, and if I can find the right kind of paper, even some 2B pencils may be adequately dark. On days like these I prefer thick, triangular learner's pencils from german brands like the Lyra Groove.
I've got the Hi-Uni and Mono100 in 6B form, plus the Palomino Blackwing. The Hi-Uni is darkest... but while all three are clearly premium pencils, breaking graphite in a very elegant way, I think I just might like the MP's inherent "sharpness" a little more...which is slightly tempered when you use a soft lead like 4B, for a lovely combination.
In fact I've seen some bloggers claim the way 4B leads wear down is almost like a natural kuru toga mechanism...not that I've noticed, lol
So, my favorite MP lead is Pilot's geox graphite 4B, because it's possibly the darkest MP lead on earth. Even outside the "G" line, Pilot leads are softer and darker than comparable Pentel or Uni nano dia's.
For MP hardware my tastes are really maverick: I couldn't get myself to like most of the models highly regarded by enthusiasts. But I love the alpha gel I mentioned; I found the Rotring 300 & 500 meh, but really like one of the most-average, late-model Tikky's that people abhor.
Also, Muji's polycarbonate body feels totally hideous with a gel refill (quality control is terrible), but improves so much with an MP mechanism installed. I've fallen out of love with Muji on the whole, but this is one product I can still enjoy.
Thanks for reading :P