Here's the character model from my "Speed Modeling | Male Civilian" video. The whole process took me about 15 hours, though that's more or less due to experimenting and adjusting things. I'll post a video of this process slowed down with my commentary over it where I'll go through all of the steps for those who are interested. I'll do the same for a female character model base soon.
I actually finished this model a week prior, but there were some proportional issues that made me decide to scrap it and start over again. Not completely over. I still used the finished sketch turn-around to make the model you see today.