My two pence for a mix of bridleway and trail riding:
In the dry, Maxxis Advantage 2.25 rear – fast rolling, big volume and decent grip for anything but mud.
Nobby Nic 2.25 snakeskin font- better grip than the advantage, pretty fast rolling but wears way too fast to ever use on the back.
When the rain comes down, stick a Bontrager mud x on the rear – really good grip in mud, light and fast for a mud tyre but not great on rocks and root ( to small volume when used on a hardtail for one thing) so I put the advantage back on for trail centres.