Having an address without a wallet If somehow I have an address with its corresponding private key but I have no wallet (well maybe I use some wallet to generate the address/key and then throw it), would it make sense to collect coins to that address and in the future redo the wallet with the addr/key to handle them?

Does that make sense? I am thinking of it as a security police to not have a wallet on a computer (neither connected to the net or not)
Absolutely! Generate your public and private keys using a wallet, save your keys somewhere, you can even print them on a paper and put it in a save place. I think this is the higher level of security.

Additionally you can split your coins in 10 wallets and print them separately. That way if you need only 0.2 bitcoins you can take two keys and import them in your wallet. This gives you flexibility.