If the heuristics is not too dumb, and the FPs are not too many, then I prefer high detection rates.
Cloud is great, don't get me wrong. It's great for data storage and syncing, it's great for streaming malware database updates, performing real-time online analysis and other security-related tasks, and et cetera. Right, but I just don't take internet connections for granted anywhere, so I like to have cloud stuff as complements, and very important ones, but I still like having local backups, local databases, local heuristic analysis, and so on, as well.