Hi Guys,
I think, before people decide on a university degree they need to make up their mind about what they actually want to do.
Do you, Colt;
1) Want to hang around cool reptiles etc, or;
2) Have a serious interest in Science
Most of the answers have skipped over the fact that to be a practicing herpetologist you are a scientist first and an reptile lover second. Herpetology is the field of zoology which concerns itself with answering basic biological questions using a reptile as the model organism. Obviously however, it does help to enjoy the group you work with because that makes the pursuit of the "science" even more interesting.
If you are more interested in having encounters with the animals than answering basic questions like "why are arboreal snakes long and thin and terrestrial snakes more bulky" then your best choice is, IMO, the Zoo career/TAFE option. If you have a questioning mind and are fascinated with the "WHY" in the world around you, then the latter may be the right option.
Some general comments, having recently come through the university system, are that if you really don't know what you want to do then don't go to uni - take a gap year (or 2/3). Almost without exception, the people I know who did not know what they wanted from Uni changed their degree, often more than once, and ended up spending much longer at uni than originally planned.
You can do a basic ecology/biology degree (Bachelor of Science; BSc) in 3 years at any Uni is Aus (I think). When you finish you have the option in doing honours or postgraduate work with any life-form you want. Snakes, lizards, birds, Koala's, E.coli or cactus! Just make sure your grades are good enough for a supervisor to accept you.
And remember, for those who are herpetologists', and did "the boring stuff" to get where they are, it is probably not because they "stuck it out" but rather that they actually enjoyed the science behind the boring stuff as well.
Final word, do what you enjoy. Don't struggle through 3 years of boring undergrad just so you can become a "herpetologist" at the end - because chances are, you won't make a very good one!