Quote Originally Posted by freygr
I would gladly have a full frame camera, but when I do action photography the 1.5 lens multiplier is very nice.
Exactly - would you rather carry a 70-200 f2.8 or a 300 f2.8? One's more versatile since it's a zoom, smaller, lighter and about a third the price. Obviously a lot of advantages.

Looking at it in terms of dollars and cents, currently full frame DSLR's are a lot more expensive than 1.5x or 1.6x cameras. For $500 I solved that problem with a Sigma 10-20 and there are several other choices as well between that price and $1000 USD. Would it be fair to say that a full frame sensor is about a $2000 adder? My very minor complaint above is that using the 10-20, I have to set it at about 14mm to get the 20mm angle of view I'm used to seeing with a 35mm format (or full frame) SLR.

The wider the lens, the more perspective distortion. Sometimes it's fun, sometimes it makes an uninteresting photograph interesting (but it's best not to overdo it) but it's something to be a bit more careful with. And being a little more careful with composition never really hurt anybody...