I have the same "issue", I'm 29, I listen to, and always have, a lot of 70's 80's bands, they have influenced my writing style and performance etc. I have been told that I'm very "American" and a bit "country", which doesn't bother me cos i love that stuff. I have been told that my songs aren't what the british want, but i can't, and won't change my style to suit so il just move to america one day haha.
What I'm basically saying tho is just write what you write, its better to be honest when it comes to creativity, cos its hard to fake it (or at least fake convincingly).
Thats just my view tho.
All the best and keep on creating:)