I like hugging those I'm very close to (DH, my son, my best friend) and I don't mind hugging those I'm close-ish to (my parents, extended family, etc.) I don't tend to initiate hugs outside my husband, son, and parents.
I despise social kisses. I kiss my husband and son. I do not kiss my parents, friends, or relatives. My grandmother sometimes demands a kiss (when she's not giving me the cut direct) and I kiss her cheek, at which point she complains about me not kissing her on the lips. Which I refuse to do.
My son is 2 and is a lot like me in this respect. He hugs and kisses his favorite people. When he's active he doesn't have time for it, but when things are quieter (like bedtime) he wants dozens of hugs and kisses. He does not want to hug anyone he's not very close with, and I ask people to respect that. People think they should be allowed to force hugs from him, or guilt trip him for hugs ("auntie's going to be sooo saaaad and cry if you don't give her a hug!"), and I do not allow that.
I personally think kids need hugs and loving contact, and it makes me a little sad to envision a parent who won't hug their child. But I won't judge anyone for that choice and I would not say anything to them about it.