Prefer alone! When I ride with other riders, it seems they draft for 10 miles then sprint around lifting the pace by 5 mph. Takes a minute or two to catch up and when I do, it's my turn to take the front again!
If I could find a partner that understands the meaning of 'helping out' rather than trying to impress me with a 30 second sprint, I'd be happy!

...I've met maybe 4 others that have a clue!
BTW, BigJohn and Tortoise are a couple of the good guys!
Oh oh oh oh! And my wife, one of the few that will give me a break if I need it!