The best katsup I've had is stuff I made myself... all others taste pretty similar to me. Homemade stuff I can make it taste anyway I want.
Do you have a ketchup recipe you can share? I think I remember you posting a picture of steak, homemade fries, and homemade ketchup. Looked so good.
Serious Eats has a good basic recipe for Catsup... I'll try to post something to the recipe section soon, but I just make minor tweaks to what serious eats lists and I rarely measure stuff out exactly. Start small, tomato sauce is cheap, try your own tweaking, keep at least mental notes on what flavors you like more than others. It's kinda amazing how much difference there can be with small amounts of changes to some of the spices like cloves, allspice, cinnamon, etc...
Additional garlic, pepper, or hot peppers can also make stuff get real interesting... kids might not like it, but I don't make mine for kids.
I don't typically use a blender, mine is left with chunks of stuff... if you blend it, it can really change the flavor a lot, so be careful about that