I just rediscovered torches and it is only because of LEDs and the multi modes they offer.
The fixed brightness ones are never the right brightness. I am a little dubious about the SOS and beacon modes. Strobe is very good for attracting attention, probably better than SOS, and is also really disorientating if you were ever faced with an attacker it would be a good defensive tool.
Many of my torches are very bright, SSC-P7 and SST-50. Obviously I wanted something very bright, but there are unusable close up on high. With the multi modes they are so useful and do it all. The Quark with its super low moon mode and twist to get the highest mode works really well.
The minimum I would consider is two modes, high and low, my ideal would be Super Low, Low, Mid, High with a super high using a twist with the Strobe then available. Of wait, that sounds a lot like a Quark without the SOS.
Multi modes are the only reason I have been buying torches recently.