". . . everybody knows that there are many persons who would rather not drink ale or porter at all, than drink either out of a glass. Their affection for pewter pots is so great, that one cannot help thinking there is something in the peculiar metal itself as palatable to their taste, though only put to their mouths, as is the liquid which it contains. One of the late Irish M.P.'s was so devotedly attached to drinking porter out of a pewter pot, that he rather preferred running the risk, when he went into any tavern, of being voted, as he used to say, " ungenteel," than submit to the privation of not having the liquid in a pewter pot. His plan for concealing his metallic partialities from the other persons in the room, was to instruct the waiter, when he brought in the porter, to place it under the table. This done, the ex-honourable gentleman bowed down his head, and took draught after draught of Whitbread and Co.'s " Entire,'' as occasion required, replacing the pewter pot with its contents, each time, in its locality beneath the table."
"Sketches in London" by James Grant, 1838, pages 126 - 127. From Barclay Perkins blog.
If you like the taste, then keep going! I'm not sure some of the younger drinkers would care to acquire the taste though.
Interesting, I have a stainless pint glass from Glastonbury this year. Obviously has a neutral taste, but head retention is consistently poor in the vessel.