I full out DIY now, but I was always mixing a little of this with a little of that, as soon as I started.
I'd buy vanilla and turkish tobacco and blend them - that was my first favorite.
I don't like it anymore - in fact, I have a huge bottle I've been slowly working my way through that is a really icky looking mixture (I put a label on it that says "MUD") of at least a DOZEN different variations of tobaccos, vanillas, vanilla tobaccos, RY4's, etc. All stuff I didn't really like - so I mixed it all together. And surprisingly, it's actually not too bad!