well, I'll try and find a way to vocalize why it's my favorite... not sure it will come thru in text however so bear with me....
1. They tend to be between 15 and 18 inches on average.... in my opinion this is the sweet spot.... any smaller and they loose a lot of the momentum you'd gain with the impossible to describe wrist roll which makes Kuks such phenomenal chopping knives to start with. The belly forward weight, and the wrist roll chopping method combined make them punch FAR above their weight... which in some cases is already pretty substantial. Any longer than that, and you start to limit the packability, useability, general usefulness of the overall pattern... the best knife for the job is the one you have with you when you need it...... and while a 25 inch 64oz Ganga Ram will certainly get thru a 4 inch downed piece of log faster..... it's pretty limited in what else it can do, and portability so the odds of having it on you when you need it are much smaller. ...... I could go on and expand this line of thought into a much longer post than you care to read.... but the basics are, it's the perfect length to be perfect....
2. The weight on a Tamang is USUALLY near to 1oz per inch.... and for a dedicated chopper, you could argue more is better.... but you could also argue that an axe is better.... I do have dedicated chopping Kuks... some as heavy as 72oz.... but what they CAN do is damn limited.... and short of felling a tree, a smaller knife is better.... they are so heavy that I have to leave them stationary, at home, and at home, I have no less than a dozen axes that do a better job of chopping. The lighter weight leaves the Tamang quick, agile, nimble in the hand, as capable of doing light work as it is at doing heavy work. I'm a Bushcrafter ( never knew it till it became popular, but that's what they evidently call growing up in the woods, hunting, fishing, living off the land, and camping now days .... go figger ) .... as a Bushcrafter, most of my " large knife tasks " are less brute force, and more ..... finesse... its about being able to place the sharp edge of a blade, where you need that sharp edge, and keeping it away from things that don't need a sharp edge's attention... if that makes any sense... Yes, the Tamang can chop... yes, I can baton it thru wood and split firewood out of bigger sized logs, but it can also field dress and quarter a deer, fillet a catfish, cut a spool of twine for a trot line, delimb branches, clear a shooting lane or hiking trail....etc etc.... and be carried effortlessly between tasks till needed. .....again, I could type for days about why it's .... perfectly able to replace both a large heavy knife and a small light knife...and do so in such a way that you don't really miss either....
3. The SHAPE of the Tamang... and this I can't stress enough as being important, nor can I verbalize exactly WHY it works as well as it does..... the thin straight section is the perfect length to be useful as a draw knife, carving stake notches, cutting the heads off a catfish.... on and on and on.... the Belly has ENOUGH belly to still give it that weight forward feel, but also allows you to choke up on the back of the blade, skin a deer, chop a log, catch and drag twigs and small branches back into the cut so they don't glance and deflect.... etc etc.... and the point.... has enough point to be ...pointy, for all the point related stabby pokey things you need to do.... drill out a hole in a fireboard, start a cut on an animal hide, any precision carving....
The gentle downward sweeping curve rather than the more abrupt traditional Kuk bend lends power to the stroke, but does not limit its ability to preform tasks a regular Kuk would struggle with....
I don't know.... it's hard to explain my love of the Tamang.... but I'm betting you get that big epiphany and AHHHH! HAW!!! moment the second you pick one up.... without even using it much.... but the more you use it, the more it becomes closer and closer to perfect....
/shrug.... at least for me....
YMMV