Listening to Jesu tear into Neon Genesis Evangelion with all the logical force she can muster is awesome, not to mention just how long it took her to deal with both subject matter and subject presentation.
Her Fruits Basket Radio Drama, a project that she's rightfully proud of. Her scripts convey the original manga's light and heavy material exceptionally, and the acting is on par with the anime's already well-done dub. The fact that these are all actors that are doing this project for free is awesome enough.
Her Digimon retrospective. The entire thing is getting into what so many of us have left to the wayside and analyzing the plot and characters we had loved so we, like her, can see the Digimon series with a new and more knowledgeable light. Of special note is her Digimon Tamers retrospective; to put this in perspective, analyzing one Tamer and their Digimon takes up to a half-hour and it's really worth a listen.
She starts off her Romeo X Juliet review by reciting the summary in a nearly 2-minute sonnet written in perfect Shakespearian sonnet form.
Someone in the comments for her and Nash's The Secret World of Arrietty blog decided to attack Nash for being a smoker, and it wasn't worded very kindlynote Nash uses a device called an "electronic cigarette", which works differently from a regular cigarette and questions about it are common enough that it appears in his FAQ for Radio Dead Air. JO's response (in the second page of the comments of the video) is nothing short of pure awesomeness.
In Oancitizen's Melancholia review, she demonstrates She Really Can Act. As the rapidly despairing Kyle outbursts at her, she calmly drops the bubbly attitude to tell him to get a grip. It's too calm for anger, too empathetic for Tranquil Fury, and yet too stern for pity. Whatever it is, it's certainly authoritative, and one of the most awe-inspiring parts of the video.