DS is 19 months and he has been full time at nursery since he was 8.5 months.
This is what he can do - say mama/mum, daddy, baby, cat, car, tractor, Hiya/hello, bye bye, ta (thanks) cak-cak (quack quack - duck) yes, no.
He walks and runs, is adventurous and fearless, will climb up steps to get on a slide, get in and out of a toy car or similar, not scared to try new things.
Laughs loads, babbles almost constantly but only has the above words at the moment.
He understands things but sometimes doesn’t always seem to fully comprehend. So I will ask if he wants a drink and he will say no or shake his head but then have a drink anyway. Knows the actions to songs like sleeping bunnies, dingle dangle scarecrow, wind the bobbin up etc
Can drink out of one of those cups with handles but sometimes pours on the floor 
Can feed himself but struggles with some foods. Sometimes resorts to fingers. Gets annoyed if I try to help.
So all that sounds positive (I think.) But here are the things I’m worried about.
He can be very aggressive with other children. If we are at a group and someone else has a toy he will try to shove them away and/or snatch it. I’m on it and I don’t let him. But he has bitten children at nursery. Never with me but he has shoved / snatched.
He then has a real meltdown to being told no. Yesterday went on a game with a friend and her child, exactly the same age. Both children didn’t want it to end, her little girl just said ‘again, again!’ Mine had an absolute screaming meltdown, roaring his head off and had to be carried away 
Its mostly the meanness towards others and the very over the to reactions to not getting his way … I’m worried I’ve spoilt him a bit? Does he sound OK?