Silicone or metal muffin tin?

I prefer metal, but if I'd to use silicon I would put them on a tray [not on the oven shelf].

I had the uncoated metal ones which had gotten grimy and all banged up so I bought the new ones that are coated and it makes it easier to remove the baked items. I am not sure if there are any health hazards but at this point I am not concerned about such long term things. 

Yes paper liners stick to the muffins. They are supposed to. It is one of the things that keeps muffins fresher.  The less of the muffin that is exposed to air the less of a chance for it to dry out. 

But to answer...

Silicone pans of any type tend to leave the baked good less brown and much softer. Almost damp in my experience.  So I lean to the metal muffin tins.

Get a good quality, heavy duty one. 

Silicone bake ware is heat-resistant and safe for the oven and freezer.The metal muffin is also good.It depends on your preference .

Either does the work, silicone is easier to get, sometimes also easier to use so I use silicone. But metal is better.

I think that metal muffin tin is better ,because silicone tin may leak gas or bend out of shape if it is exposed to high temperature ,what's more ,in relative terms ,metal tin usually have a good airtightness  ,it ups to you to decide ,because some silicone will be in stable conditions if it comes in contact with high temperature ,

I prefer a light color metal muffin pan.Dark metal pans tend to get overheated,and dry out the muffins.

Always metal. Silicone is a pain in the a$$. It is too wobbly.

Silicone is a waste of money and is better used to line the corners in a bathtub or for breast implants. Just use the dreaded 'paper liners'. 

If you are going to be using paper cases then buy metal

.. and if you say that you aren't then buy silicone.

You won't get a cooked muffin out of a metal tin without using paper cases.