I find that "different is good". Since I normally wind up riding by myself by default, anytime I get to ride with other people, I enjoy it. If I rode with a group all the time, I'd enjoy getting out by myself for the same reason.
One unexpected benefit of riding with a group was finding a better route near my house for my daily rides.
You can learn things about riding, technique, gear, etc. from a group.
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"be careful this rando stuff is addictive and dan's the 'pusher'."