Between daycare or nanny, I would definitely rather have a nanny at home.
I do not have children, but many of my cousins and close family friends around my age (I will be turning 25 in less than two months) either have had relatives or close, trusted family friends watch their children. When I do have children, I plan on doing the same. I would rather have my child(ren) in the care of people that I've known and trusted for years.
I don't know if it's a cultural thing (we're Asian), but many of us refuse to leave children in daycare or with people we do not know. We often live in multi-generation households... grandparents are almost always available and willing to watch the kids, free of charge. One of my best friends is currently living at her parents' house (while going through separation/possibly divorce), and her retired father is able to watch her son and another grandson during the day. One of my cousin's leaves his 1 year old at the home of a long-time family friend (who's son is married to a woman that is the sister of one of my dad's cousin-- confusing, but we're all somehow related), and they only charge him $300/month.
I understand that not everyone has that option... when it comes to childcare, it is important to do some research. Ask around, do background checks, etc. Good luck to you!