I like Oliver Twist regular, but the wintergreen ones I just could not tolerate. The taste made me ill. I've used OTs for about two years. When I started, they had one called Senior, "for experienced users only." What a nic kick that was. I loved it. So of course it was discontinued. The regular is as strong as it gets.
I've had Tropical, Citrus, Royal .. all of the flavors, as I recall. I kept coming back to regular.
They are not like snus, but nonetheless do not require spitting, and aren't chew. They are, in fact, a new "hot" item. General is moving into tobacco bits and I expect those on Northerner and GetSnus before long. Picadelli is not as good as OT. The Picadelli bits crumble and unfold far too quickly.
An OT bit can last me an hour or longer. Just beware: Very strong tobacco bitterness. Not really like snus. And, once the packet is opened, the bits dry out and harden in a few days. So plan to use them up quickly.