This is one of the few things that I've hung back from on solo trips, but all these comments are really encouraging! I still remember a random hug I got from Ballou over by Splash one time years ago (no one around, no line)...Those characters sure know how to give a great hug! I once stood watching the very little ones getting hugs from Mickey's teddy bear at Epcot (what's he called?)-- it was so darn sweet. I should have joined them!
A bit different, but I've had loads of fun on solo trips during Star Wars Weekends, interacting with bounty hunters, Jawas, storm troopers (I spanked one once), etc. It's not about hugs...but they'll sure chase you around! Super fun. And trading with Jawas! I gave one a Slim Jim and I got a stupid plastic dinosaur, which I still have. You're not trading with a Jawa properly if you don't come away feeling a little ripped off. Love!