Depends on what's your goal. Privacy and the least amount of paperwork? Probably a place like Wyoming, where your annual report is a single page saying "yeah I'm still alive". But an LLC will usually need to be parallel-registered in the state it's doing business in, so if it's a pain-in-the-butt state like California, might as well register it here - you're not escaping their fees and paperwork either way.
OutOfHere · · focus · HN ↗
Also, what type of LLC should it be?
socializer · · focus · HN ↗
Delaware is for big companies.