I would suggest to definitely listen both praises and criticism from others (as it helps to educate your nose and define your likes and dislikes) but leave the ultimate judgement to yourself. I am sure you will come across many scents that don't get a lot of praises but you will love, and vice versa.
I'd give GIT a try regardless, it's a great scent and is absolutely worth trying. If you don't sample it now, you'll just keep wondering what it's like and end up doing something silly, like buying a tester bottle blind from Basenotes classifieds just 'cause it happens to be a great deal I'd also recommend Millesime Imperial and Santal Imperial. I know many like Himalaya, Royal Water and Acier Aluminium, although these do absolutely nothing for me. If you have a wife or a girlfriend, grab a sample of Love in White.
Once you're ready to buy, get a tester bottle from from Basenotes, MakeUpAlley or even eBay (if the eBay seller is very reputable), otherwise collecting Creeds can proove unnecessarily expensive.