They say that the smells people are attracted to are ones that smell pretty opposite to themself :L
I guess that's based on how most things have a smell, but you only notice it if your nose isn't familiar with it in everyday life... (i guess how like people get sick of certain foods after some time/taste isn't as strong, etc.) so unless it's interesting/different/new you can't smell it ... like how people can't smell themselves, or have less of a sense of smell with smells that are somewhat similar to their own.
Like, some people say my smell is strong, other people can't smell anything... and I have this friend, who when I first met, I could literally smell her from 1m away so I'd always know when she'd walk by, but now she's my best friend, I barely notice it at all.
If someone walks past me tho, I usually get a whiff :S