Going to add a different perspective ... until I started working outside Australia I went to Subway perhaps once or twice a year. Or not at all. I didn't really see the point in it when there are heaps of good quality sandwich placed offering loads of choice and much better variety and quality of breads and fillings.
However where I work in Singapore whilst there are some what I call not-quite-right sandwich options in the vicinity I actually find Subway a reasonable (in terms of price and quality) compromise., so I do go there more often than I would have.