I use Dunlop Tortex .66m for funk and rhythmic playing and Tortex .88m for rock and leads.
 
Then again, I work for Dunlop so I'm probably a little bias.

Jazz III and some new picks (I forget the name) they stick to your fingers once they warm up. They have no thin picks though but they do have some Jazz III style picks.
 
J

craigb

 
My preferred pick delivery method. 

She needs a slice or two of that pizza

Welp...at least for the nonce, I'm a convert. 1mm for electrics and (heresy) 1.5 mm for acoustics. Don't hate me because I'm beautiful!

Man, I went and looked because I remembered the "pizza slice" pick. Just a warped orange piece of plastic now with no writing whatsoever on it - had to look it up to realize it was "originally" .60mm (probably under .5 now), so I guess I got use out of that one. Never realized all the crap I collect until I opened that box.
 
I found an antique thumbpick that looks like the end of a spoon rolled into a donut (with the engraving you would see on a spoon handle). Thick as a dime and pretty much unusable, but looked strange enough to keep. It might have been a "legitimate" thumbpick, but no clue of its origins.

Now for when I want to use a pick with a bass, I use one of these:
 
 or 
(Felt or cymbal.)

I find the talk of 70mm picks...unlikely? :-)

Thanks for the heads-up on the Dava picks, I ordered a selection of them to try out.

I've never got on with tortex (dislike the material) or nylon (too floppy) picks myself.

I recently got a few different picks from PickBoy, the 'pos-a-grip' ones are very stable.  I also like delrin picks and have been moving more and more towards thicker sizes (1.5mm).  Can be a bit slippery, but a Monster grip dot on the thumb side solves that problem.

I think the oddest pick I bought recently was a ceramic PickBoy one.

I use 70mm Al the time. They are great for ice scrapes. Lol. Nah. Waiting on the PrimeTones to come by mail. I hope they are great.

craigb
For decades I used these:
 

 
Now I use these:
 

WHAT?
 
Those don't say "BECAN"?

I still have no idea how people grip 70mm plectrums :-D :-?
 
Anyway, my current search for TOTP (in lieu of the PoD) continues...throwing up some more likely candidates (listed below) to join the growing throng in my 'Jar of Various Plectrums'.  Which is a small glass jar I got for a £1 from Tesco.  That has various plectrums in it.  Perhaps the name gave that away?
 
Anyhoo:
 
awe-in-one
snakepick
planetwaves black ice
swisspicks
sikpik