Wow! I forgot to mention but I do this too! Thank you! My wife has called me paranoid of the highest order and now I can point to this comment and feel better that I am not the only one.
>> I've tried online backup services and was really disappointed by the throughput
Yes. I have been disappointed with all of these services.
>> Flickr as photo backup but the retrieval process is brutal.
Yes. I tried apps like Flickery etc but it is just not worth it.
>> I do use Dropbox
Nice idea. I have some files on it but I only use Dropbox (the free version) for files that I need on-the-go for anywhere-access.
>> I do use BitBucket for almost all of my source code and I've been pretty happy with it.
Same here. Bitbucket for some private random experiments and projects, Github for things that I don't care about.
>> I do use Time Machine on an old 1TB
Actually, Time Machine is the only decent backup utility I have ever found. Ever. The ease of use is just mind-blowing. I remember more than a decade ago, when my only chance was to wipe out the system and reinstall the OS or to keep a partition or separate drive for home/data. And with newer OSX, Time Machine can back up to as many drives as you want, which makes it easy for me to take actual direct backups on multiple drives.
On top of it, privacy is such a big concern. Then, it usually becomes a pain. I tried https://www.aerofs.com/ too but then left it because it was too buggy. I will have to try it again.