I've learned that I'm terrible with names, and keep having to refer to my handy dandy notebook mid-interrogation just to remind myself of who the murder victim was

I've also learned that not all skepticism is good when it comes to detective work. I often second guess my own evidence, feeling that it seems a little too circumstantial to convict someone with.

And finally, I'm too trusting of the dames. A classic noir no-no.