For me, the best has to be Eric. He puts a lot of subtleties into his acting that I think come across well in making the character more real.
The worst ... Donna. Definitely. Someone else was right about her monotone deliveries. Then again, Jackie also really sucked in any scenes wherein she had to be emotional. I'd say it's a toss up.
Eric was the best. Worst was definitely a tie between Fez and Donna.
shareBest for me was Debra Jo Rupp as "Kitty". A great smile and laugh. Could show sadness and disappointment very well. And the best was when she would go "Psycho Kitty" about something and start to shake haha.
Worst for me had to be Josh Meyers as "Randy". I just couldn't care much about Randy. Like yourself, I was a big Eric fan, and when he was away, Randy's presence always felt odd to me. I always thought they should have just focused more on the other core members and not added anyone.
Yea everyone hated Randy.
shareEric best. Jackie worst, but Donna a close second.
shareI honestly never thought Donna was all that bad. Everyone is a broad caricature of a type, and I thought Laura Prepon was the most smart and grounded of them. So if that made her less entertaining, I guess so. Really is hard for me to judge them on "acting." Wilmer was awful and also hilarious. Same with Kunis. She couldn't miss with what was asked of her, she's so pretty and all. Donna was asked to play it smart.
shareDonna Prepon seemed to mostly have just one monotone way of speaking and a limited range of expression.
shareRed was the absolute best character in the show. Favorites are Red, Hyde, Eric, Kelso, Kitty, and Leo. Donna's okay but not my favorite.
Least favorites are Fez, Bob, Mitch, and Jackie. I find Bob and Mitch really annoying and understand why Red doesn't want to hang out with them. Also it goes without saying that the show stunk when Ashton and Topher left.