If you position a light exactly where the camera is, you will see no shadows at all from that light. Every object that casts a shadow will prevent you from seeing its shadow, by definition.

Bounced light (off walls and ceilings) will produce very soft and indistinct shadows - as you've already seen.

Also, for point and spot lights, you can set the shadow blur radius very high (and raise the shadow samples to keep them from being grainy).

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)