As QPQ suggests, being on a bus route is often a positive factor. (It's only having a bus stop right outside the house that can sometimes be a negative, as potential buyers can be worried about bored people in the queue staring through their windows).
All houses constructed since 1999 have to incorporate a wheelchair accessible WC which, in many cases, means that modern houses are now built with ground floor bathrooms. (I was brought up in a house with a ground floor bathroom and I regard is both 'normal' and 'logical'; I'd much rather that my present home had the bathroom downstairs than upstairs!). So having the bathroom downstairs certainly won't deter everyone!
'Ex-council' was a definitive 'negative' when the 'right to buy' was first introduced but, now that nearly all former council houses have moved into the private sector, it's almost certainly far less so nowadays.