The thing with digital modelling is that there are some hurdles and obstacles to get over. First, it’s the software that you’re using. Secondly, the theory and fundamentals of digital modelling (topology for example). These things can really hold you down if you’re the analytical type that wants to know the ins and outs before you even begin to do anything. With digital sculpting, you don’t have to worry too much about all that, but the downside is that you need a fast computer to really have a smooth and fun experience or experimentation.
Poly modelling is a lot easier in that you can look at topology references and get straight into it, following the muscle flows right from the start and tweaking your way outward (like a ripple effect).
Box modelling on the other hand requires a different mindset, and can be challenging for some. You’ll have to learn how to manipulate flows with spin edge, multi-cut and so on. I like Box because it bends and twists my mind in a lot of ways. It’s the modelling method that I started out with, and it’s a habit that is very difficult to break, but I must learn to break this habit and try other modelling methods in order to grow and expand as a modeller.
Some people find that Box modelling got easier after they did a lot of Poly modelling. I guess one of the reasons for this is that while poly modelling, you’re forced to look at topologies and your mind makes a record of all the flows. So when it comes to Box, you can immediately see how things ought to flow, and from there all you need is just some good techniques to change/manipulate flows.