Medical Sales job presentation, Interesting Title

HI there,
looking to move into sales, specifically the medical sales role. I have no previous sales experience, but a pretty strong academic background in the field, however, i have been asked to do a 15min presentation entitled:

"Events that have shaped my desire to move into sales"

At the momet, I am thinking that I should really look at the key characteristics, and try and match them to previous experience.
Also wondering if i should include future aspirations (Which I beleive they know already), which is to marketing.
Any help or ideas appreciated.

Well this clearly did the job, did not mention aspirations for marketting, however, I have been offered the position!

Congratulations Giblets... I hope you have a successful new career in sales... its hard work but very rewarding! And bit like Marmite - you'll either love it or hate it!
Pamela