My Mom likes them. She used to take care of them for me many many years ago when I was in elementary school. She did a very good job caring for them, and she still looks at mine nowadays. She knows exactly how many I have, and she has no issues at all with me being such a large-scale collector. It's something I love, and it doesn't affect ayone besides myself...so she's alright with it.
My Dad lives in the same house, but I don't think he even knows what Tamagotchi are. He just sees my gigantic Rubbermaid tub of them occasionally when I bring them down in the living room. He has asked me how many I have, but I really don't think he could tell me what they are.
My brother gave me all of his years ago. He doesn't really care about them.
My boyfriend enjoys Tamagotchi, and has purchased several for himself. ^_^