Why is my baby grumpy all the time?

My son is about to be 10 months and he’s just always so grumpy my other 2 kids were smiley and sweet and lovey and always wanted to be held and kissed but my son has just never been a happy baby… he’s not sick or anything he’s just never really been smiley and sweet.. he always looks mad at the world. He likes my husband he said that he’s a good baby because he “never cries” but he’s also never happy just seems really emotionless/unhappy and I worry about him is anyone else’s baby like this or is it just mine?

He’s also never even tried to start walking or talking he crawls around but hasn’t started pulling himself up to stand like my other kids did. I know all kids are different but I just feel like somethings off.