Chummer is cool, but incomplete if you're using any additional sourcebooks. I actually found 5e creation to have a good learning curve. I made a character tediously first, looking up everything, going over the creation chapter step by step. It was interesting, and my character (who I didn't actually get to play) was an angry Sushi Chef who got into debt to the Yakuza, and was a runner because it moved him closer to having the money to repay them. My next character went faster, because i had an understanding of the priority system, and I had a better grip on gear, so i fooled with essence, and made a dwarf with really low essence that was so altered and lost by the machine that it took strong emotions to even get a metahuman response out of him. He'd get upset any time things happened that weren't logical, and occasionally lost track of (and forgot about) anything that wasn't sorted properly. When I read Run Faster, i realized I could have probably made him a mild head-case. My point is that the system is awesome, and there are so many many ideas you could use for characters, but you have to jump off the diving board eventually if you're going to realize any of them. Chummer is cool, but don't come to rely on it, make sure you know what the numbers it shows you mean.