Part of the reason why a model I work on takes so long is I want to make quality stuff.
As Digi nobody is around me to tell me I need to meet a deadline. Having worked for a company that basically makes shit products due to bad business I use to be told ALL the time we need stuff to be done 2,3,4x sooner then we budgeted for to even have a barely average product. Much of that is due to terrible management that are unable to budget project timelines. So you can say working on my own stuff lets me get out years of frustration!
Another part is pride in what I like to do! Lastly real life stuff comes up and so often comes before what I can only argue as fun stuff. I mean I don't get paid to make models I give away so it doesn't get me out of any responsibilities.
Anyways Miku is pretty close. Last few big things on my list is.
Fix the elbows of the model with the skin under the gloves. (This requires re-importing the body in parts and rigging it over again.)