Ohhh... Yeah, that sure looks like a roo to me, especially with the barred tail and the markings on the back.
I got 3 of these as part of a straight run. 2 ended up to be pullets and one was a roo. There is a ton of good info on identifying pullets from cockerels here on BYC.
Yeah, he crowed quite a bit, though not as much as our speckled Sussex or the Dominiques. I find that my roos all crow in the am, then again when I let them out of the coop, and after that... Maybe a couple times every couple hours...? Like 2-4 times in a row, but then quiet for a while.
They are very curious about everything. If the run door doesn't latch, it'll be a Delaware that gets out and meets me like a dog when I come outside. When I painted the nest boxes and clean-out door on my coop, the Delawares were the first to get paint on them, pecking at the wall, jumping up to try to get my paint brush. They are always the first ones over to see what you have.
I didn't find him to be particularly aggressive. He pecked a lot out of curiosity, like, if he discovered a freckle on my arm, or toenail with polish, or earring, but I don't recall him being aggressive to the hens ever. We ended up with a lot of roos in that batch, and so I just made a point of picking him (them) up and carrying him around every once in a while, or if he got disrespectful. He was a quick learner, and after getting carried around for 10 minutes or so, he was generally very respectful. I didnt feel like he was sizing me up or planning an attack when my back was turned.

He wasn't prone to chasing my kids or hubby, either.
Your guy looks like he's going to have some beautiful feathering and markings!