It depends entirely on where you were. For example, given the opportunity, people bathed. Streams and pools in rivers were popular in hot weather. The notorious 'stews' of London's South Bank began as bath-houses with stem rooms. Muck meant money, so carting away filth and refuse would be worthwhile for most of the time. The foul muck-laden streets of the worst of later medieval and Tudor London would have been the end part of a long process of change and accumulation. There'd be a fair amount of wood-smoke and some 'sea-coal' smoke as well, from cooking and from processes such as dyeing (which would stink) and glassmaking (ditto). On the topic of what people smelled like - people only stopped smelling like people after the 1950s. Open any museum display case with garments from the past inside, and you'll detect the faded smell of armpits, attempts at deodorant, mothballs and tweed - which Terry Pratchett points out, smells of wee. Nowadays we are brainwashed into finding human smells offensive but in the past people relished the scent of others.