Clamps, What is best type

I agree with Chuck. You need more than just one type of clamp.

I use:

Close pins

Adjustable bar clips (shaped kinda like a handgun)

C-clamps

Spring clamps from Harbor Freight, 2 sizes

Alligator clips

Binder clips- 5 different sizes. These are for heavy duty clamping. I used then to glue the hull halves of the C-57

Spreader clamps? not sure what these are called. Made by Irwin. They are kinda C shaped but are not C clamps

Potato chip bag clamps

FWIW, I use C-Clamps of various sizes that I get from home improvement stores.  They're big enough to work on 1/32 aircraft where smaller clamps don't reach.

Actually, a modeler needs many different kinds of clamps for different purposes.  For example, I bought some alligator clips at Radio Shack, glued a 1/8" wooden dowel into the open end (where the wire would normally go) and I use these for holding fiddly bits while airbrushing them and drying them.  Just stick the wooden dowel into a block of styrofoam and spray them as they stand there!

In addition to cloths pins (I saw off the opening mouth to make a sharper point) and the little plastic spring clamps, I am using a new style clamp that is becoming popular and has a VERY fine adjustment.  These clamps have a steel bar (the clamps are bar-clamp type) and have a plastic end and a plastic mechanism.  There are two levers on the moveable part- a quick release and a trigger that closes the clamp a very small distance for each pull.  This allows careful pressure adjustment, and they work fine on plastic models. I have bought several 6 inch Irwin brand when my local hardware store has them on sale.  I have also bought some four inch versions from Harbor Freight at a very low price (I  think a buck a piece) and they work as nicely as the Irwin ones.

BTW, Model Expo has tiny "modelers" clothespins, about an inch long (I still have to saw off and reshape the ends).

I find clothes pins work pretty well. Those in the link  look good for fuselages.