Laura, he is a really lovely veiled.
Be patient with him, he may never be as chilled and relaxed with you as he was when he was smaller, but you WILL develop a relationship with him - take it from me!! My Ziggy is now 13 months and whilst he can be as grumpy and irritable as they come, when he is feeling that way out, there are days when I open the cage and offer my hand and he willingly walks out onto it for a spot of free ranging. I let him set the pace though, which I think it why he is more chilled these days. If he hisses and lunges at me when I open the door (which sadly happens more often than not!) then I leave him alone.... but it is a real joy when he want to come out onto my hand and I spend the day with a big smile on my face!!!