Doubling pawns on the c or f file?


Your question is too general. It depends on many other things like: Do you mean doubled *and isolated*, or just doubled? Is the king castled behind those doubled pawns? Are the queens on the board? Does one side get "queen slapped" as a result? In some openings like the Ruy Lopez (and I believe Benoni) the active piece play compensates for doubled pawns, so there is no automatic answer unless you are more specific.
However is this actually good or bad? Which would you prefer? The open file helps activate my rooks and the doubled pawn adds more pressure to the center.
Personally for me I happily take and double my pawns whenever I have the opportunity. At higher level chess games is this considered a good move?