Infact it was really easy, as I watched reference while doing that so it almost felt cheap I would love to figure such angles out of my head it would be great but its not going to happen for some time, my skills are still evolving.
well if you start from a skeleton it's not sooo bad, but yeah freehanding it would be tough without a model. of course the major benefit is no one else does it like this, with those cool shapes, so it makes your stuff look unique and different. and that's always good. great job.
I actually do most of my stuff freehand, but there are some things that I simply cant manage, like those subtle curves that no matter how I try don't look like they suppose to so I take reference then and eyeball it to the max