Nice low BF cristi, thick back not much to comment really - though being long limbed and tall you're going to find it hard to look "BIG". Though @ 100kg it's a pretty good weight to be at for your height. I'm about an inch and a bit shorter at nearly the same weight.
Only thing I'd say is arms and shoulders and traps could do with a bit of work as well as chest. However your waist is looking slim! Keep it up dude.
didn't see this until now, indeed it is impossible for me to look big, especially in pictures. On the other hand, It's hard for me to look "too big" as well, and my little muffin' top can only be seen in certain poses, otherwise being tall has small advantages as well.
Pecs definitely need improvement, currently my weakest group but working on it, very slowly progressing compared to my back. Next on the list is arms, as you mentioned, especially the triceps, but is slowly catching up so I keep on hitting it. Obviously there is room for improvement everywhere, including traps and shoulders.
In any case, I've added up 2 inches on my arms in less then half an year, so I'm happy with my progress and trying to keep it going. I'll pose some before gym pics in a few months to compare when hopefully I'll have more to show.
krisboats, looking great nice progress for just 2 months, I'm sure you look even better in real life as pictures make tall people look a lot skinnier than they are.
Nice structure, arms can do with a bit of improvement, for lats try to do assisted pullups (you can use a chair to cheat them on the upper part) and focus on slowly lowering yourself. That is ofc if you can't get access to a machine for pull downs. I couldn't do pullups for the first 3 or 4 months either, but then I started struggling for 3 or 4 on each set and constantly increased the number.
Don't get discouraged that you can't do many, at your body weight you don't need to in order to build serious mass.
also, don't be afraid to eat a lot(healthy food ofc), it's very hard for a fella like you to look fat, so you can afford to bulk up a bit and still look lean.