acwire,
Not addrerssed to me directly but I do have about a dozen Tarmontinas on hand down here.
The 14 inch Bolo is a solid all around performer especially on woody stuff, easy to pack, hard to sheath, great handle.
I use mainly the 16 and 18 inch Latin pattern machetes with the smaller, round-bottom handles. Mainly this is becuuase they are the most frequently encountered in my area. I have several of the 14 inch as well and thay are real handy on the belt.
The 18 inch wood handled model in the photo above is a very solid performer. It is a little heavier than the narrower bladed Tramontinas and the handle seems to fit better for me. They are easier to hang-on to.
Machetes are like golf clubs, you pick the right one for the job... that is if you know ahead of time what the job is going to be. In long grass or when clearing land down to the ground I use a longer blade for the reach. I find a 20 inch works well and saves my back.
For general use clearing trails and campsites the 14, 16, and 18 all work well. If it is going to spend time on the belt and only be used occasionally I like the 14. If it is going to ride on the pack and spend alot of time in my hand then I want an 18.
In my experience the thicker and tougher the stuff you are cutting then the stiffer and heavier you want the blade. For light vegitation and grasses then you can use a longer, narrower, more flexible blade. I find that on woody plants that a thin flexible blade will turn and follow the grain getting itself wedged in and it can be a pain. A thicker blade won't do that. On light vegitation and grasses a long thin blade allows you to keep swinging without wearing your arm out. Anyway, those are my preferences. Mac