Marking gauge come in 2 types pins and roller.  Which do you use and why?

I am looking at getting one.

 

Both of mine have pins/knives. It's what I started with. Thought about going to the roller type as they seem to work better for either cross grain and with grain.

 

With the pin/knife type, pins work better with the grain and knives work better across the grain.

IMP both are Ok as long as the pin or roller is only beveled on one side.  The bevel will crush the wood fibers.  You want the crush fibers on the side of the piece which gets cut off.  The conical pins will crush the fibers on both sides.  Danl

I have a shop made pin style, and a purchased round wheel cutter type. Like Lew said, the pins work better with the grain For cross grain I much prefer the round cutter....though it works well with the grain. The round wheel I have doesn't roll, it's fixed in place.  understand there are some where the cutter rotates as you mark your line.

I have both but, I prefer a square and a pencil. Most times for me, marking is for cut lines. A pencil line is easier for my old eyes to see. I suppose a marking gauge is more precise but, I just cut to fit, anyway. 

Roller--mine rotates.

Used a pin a couple of times and found it cumbersome.

 

Also have a "mortise" gauge, has one side with one pin and the other side with 2 pins, but haven't used it.

 

Also used a marking knife. Like this the best.

I like a roller best but sometimes use a shop knife.

I LIKE pins...why?    Because they are much easier to sharpen.....and replace when needed.  

I have a number of them and I like both the roller type as well as the pin type because like @steven newman says they are easy to sharpen and/or replace.