First off I would like to welcome you to basenotes! You seem to have a good idea as to what you are looking for and that is always helpful when asking for assistance... it makes my life a little easier.
As someone entering the professional world you will like something nice to the nose that is not going to overdue your presense in the room but you would still like to smell good when close to people. For that purpose I would say the Green Irish Tweed, CK One, Allure, Vetiver, Blv, M7 Fresh, Baldasserini, and 212 would work.
I have heard that the medical profession works better as a scentless one. Sometimes it just doesn't belong in a hospital. I'm not doctor and have no experience but I have heard such talk about the matter.
For #3, I would suggest the following: Tea for Two (my favorite), Himalaya, Envy, Brit, and Jaipur.
Some of those are unknown to my nose but out of the ones I do know that is what I came up with.
Extra suggestions would be:
#1/2 - Neroli Sauvage by Creed (my favorite summer time frag ever!), Polo Sport by Ralph Lauren (always nice), and Live Jazz by YSL
#3 - Lolita Lempicka, A*men, Animale Animale, John Varvatos, Dior Homme, Chergui, and Fumerie Turque
Ok, that is my crazy list. I hope that it did at least some of what you wanted it to do. Good luck with your hunt for new stuff. It is always a fun thing to do. ;D ;D