Mosi is very affectionate but he's not really a lap cat. He will jump onto my lap when I'm on the computer and curl up for a sleep, and he likes to snuggle up to me in bed, but he's not really what I'd call a lap cat. He's far too busy for that kind of thing
He does love attention though and has to be involved in everything I do. Cleaning the shower, tidying a cupboard - whatever I'm doing he's there to "help". Somalis are very busy cats that like to be involved in whatever you're doing. They're also pretty lively. Mosi is calming down now that he's 20 months but he still needs several hours of active play each day (running around chasing things). He's very friendly and loves everyone. He will go up to visitors and rub his whole body against them. He is a very outgoing and lively individual though - I was told by his breeder that he was the most confident, lively and outgoing kitten in the litter.
I think he's almost done growing now in terms of skeletal structure, but he will fill out a bit more and add some muscle as he matures. He doesn't have his full adult coat yet either. Not sure about weight - Mosi was 3.2 kg when he was 1 year old but he's not been weighed since. He weighs a good bit more than that now - he looks chunkier and feels heavier. Somalis can look bigger than they are though as they're quite small boned cats underneath the fur. Mosi is a large somali and most people who have seen him were surprised that he was oly 3.2 kg at one year old - he looks bigger.