This thread is doubtless useful because it will provide a good list of leads and "red flags" for all the newbies.
However I feel we need to add a disclaimer here: "it all depends on best for what
and worst for whom
. A host from one person's "worst" list could make it to somebody's "best" list depending on the requirements. Also best this month can often be worst next month. Caveat emptor. Nil desperandum. May contain traces of nuts. Store away from direct sunlight..."
(sorry I got carried away there)