If you die unexpectedly then how will your heirs be able to inherit your BTC?

Err I wanted to keep it simple -- is my method secure?

Nothing is 100% secure but you have a good method. Live long and prosper

I would suggest to download the offline version of bitaddress.org and burn onto your live cd, so you never need to connect your offline computer to the internet.

If you write your private key down by hand, I would recommend to always write it at least twice, just in case you make a mistake or your handwriting may be easily misinterpreted in a few years time.... Another thing I tend to do is underline all the capital letters and also draw a line above the numbers, just to add clarity (if your hand writing is very neat then perhaps this isn't necessary.)

Also, the brain wallet idea you suggested isn't a great idea... If you are going to use a chosen passphrase to generate the private key, and then not even store the passphrase but only the private key, i would argue that you are vastly lowering the security of your wallet without even advantaging from the only reason brain wallets exist in the first place...Just forget about brainwallets entirely is my suggestion, they aren't worth the trouble.

That sounds a bit "mixed" between "secure" and "not secure". If you want to pass your bitcoins on, go and stick the password in a bank vault or with a solicitor

As discussed in many places, a brain wallet does *not* need to be long and complicated to have massive entropy. Eight to twelve random dictionary words is all that is needed.

Just make sure you give clear instructions to whoever you want to pass the coins onto ..... most of us techies struggle with some of this stuff. Imagine what a "normal" person would think.

It's a good idea considering the niche of the idea, but if someone were to go after you in particular, you've already given someones brute-force mechanism a pretty good start.

Hah I think that is safer than moving it into an electronic method but only if you could save it correctly with no mistakes. otherwise using a flash driver might be better.