Your lens is the 'make or break' of a good camera, and what kind of work your lens is being put to. A wide-angle or 'fish-eye' lens is OK for effect, but can be over-used. A 200mm lens for distance work is enough for most - unless you're paparazzi looking for royals to take 'topless' pictures of - and a 58mm 'portrait' lens is a must for taking closer up. A 28mm lens could be useful for architectural work where you need to get the whole front of a building in one shot, but not much use for most purposes except closer-up close-ups, taking 'pack shots' for instance, or models (not the likes of Lena Hart or Anna Schilling, although experiment is always a good thing).
If you're a sports photographer it always helps to have a long lens that fills a frame with the action - two footballers colliding near the goalmouth, an outfielder who's caught out the batsman. It's then that close-ups of facial expressions pay dividends, and fill the photographer's wallet!