Hello Cerise! Thank you for your reply.
Personality - I am quite warm, artsy and friendly. My style is conversative - typically I will wear a v-neck jumper over a button down shirt - smart jeans (dark blue, non-faded with no rips) finished off with a pair of Oxford shoes or brogues. Here are some pictures of me:
1)
http://i39.tinypic.com/15mkccp.jpg
2)
http://i39.tinypic.com/33ej03p.jpg
3)
http://i44.tinypic.com/oqbts0.jpg (note I am not short - the female in it is tall and was wearing a huge 5 inch stilettos, it's not often I made to feel small) :P
When heading out in the evening for dinner I will wear a blazer with button shirt. Sometimes I also wear black Converses with jeans, t-shirt and a leather jacket too:
http://farm4.static.flickr.com/3098/3161586696_302b9eca40_b.jpg
I do have certain preferences but it won't mean very much if others don't like it. I am just wanting something that stands out, preferably distinctive and smells heavenly to women and who is there better to ask than women themselves, right here?

Expensive ones are fine - it takes me about a year to finish a bottle anyway (even though I use it every day) so it is money well spent.
You have mentioned Creed, Original Vetiver and Herm�s but what are your favourites? If you had to pick one, what would you go for?
I will definitely try them out first, as you suggested because there have been countless times when I loved a particular scent for the first few hours and I have ended up disliking a few the next day. Ralph Lauren's Romance was one. I never over spray and know what you mean about the gym. There are quite a few guys like the D&G man you mentioned, especially in the men's changing room. It can be intoxicating.
You are quite right about the body chemistry - it does make a difference. As does skin. It makes me wonder why they spray samples on a piece of cardboard. :]