As oppossed to what exactly should we use.
"I know a mate who supports them who says he's brilliant." - "I watched him once in some random game and thought he was crap"
Or perhaps we shouldn't have an opinion at all. Frankly I would trust the FIFA ratings more than the view of and I'm sorry to say this but most of the posters on here.
In my order.
The team he belongs to forum, Things like Bleacher Reports on individual players, FIFA ratings, what I hear on forums.
My own view is irrelevant since most of the players that are talked about I haven't seen enough.