"The slight right slant suggests a writer who is 'compliant' and 'outgoing.' The long lower loops on her letters indicate a 'strong physical drive,' and the defined left margin shows her to have a strong interest in her future, indicating one who is ambitious and 'socially oriented.' Kind of like a lady who would spend all her time writing novels about social events."
It's interesting to note that this handwriting analysis comes from Austen's "Plan of a Novel, according to hints from various sources," written in 1816. She wrote this satiric parody of incorporating "helpful" advice from others, after meeting with the Prince Regent's librarian, who had strongly hinted that she dedicate her forthcoming novel, Emma, to the Prince.
The complete e-text of her "Plan of a Novel" can be found online here at Pemberley.com.