I won't be popular for this opinion,:flame: but I had an AK47 and I didn't really like it so I sold it.
I found that compared to something like say a M4 it just wasn't as comfortable. The ergonomics of an AK are pretty primative.
I also like putting all sorts of extra gadgets like scopes and lasers etc. on my guns, and the M4 platform allows the addition of these things so much more easily than on an AK47.
Also I think that an AK47 look the best without a bunch of extra crap stuck on them, where as I think the M4 style guns look extra cool with a bunch of gadgets on them.
Then again, it all comes down to personal preference.
All purely hypothetical until your 18 anyway....