Based on the fact that Kate Middleton's new one looks a bit shit.
I'm not sure what I'd go for, but it would be cooler that a few oak leaves. I know it's geeky, but I'm quite interested in heraldry, I nearly joined a club at university but the guys running it were terrifying and looked like old men even though they were only my age.
PS: Could Chintzy please reply to this thread, because I have an excellent joke to make. Cheers.