The most common paddle offset we sell is 30 degrees, but we do get a fair number of requests for 45 degree offsets. Paddles used to be in the 90 degree offset range which forces a huge amount of torso rotation and thus power into the stroke. This was (and still can be) useful for longer boats and racing where uber-power was important. Nowadays with shorter boats and more technical whitewater, the cadence of strokes has quickened and the smaller offsets allow for a more rapid transition between stroke by allowing a smaller torso rotation to engage the blade...but this has lead to an increase among lilydippers and arm paddlers. For playing (some pro rodeo stars use 15 or even 0 offset), the smaller offset helps in doing stalls, ruddering, etc. Unless you're deadset on a bigger offset, a 30 degree will be a good mix of power, cadence and predictability. Just don't forget good technique!
2510 47th St #A1, Boulder