Really, it's those plasticky ebay-bought ones that are really looked down upon. Ideally, the best ones are tailored by yourself, but nobody will really know that it was made for you by someone else as long as it fits well and you don't tell them. I for one, would consider it good enough if it was directly commissioned by you.
As for the viewing rooms, yeah, they can be depressing. Last con I went to, my friend and I were the only ones watching Evangelion. "Bleach Uncut" was showing in the room across the hall, and it was jam-packed. Seriously, people were in the hall trying to stick their heads in.