for #2 - I like the shape of the mark. Could you add another D so the initials are DTD?
Also make David Taylor Design all the same font weight
for #55 - I like it a lot. But can we tighten up the mark a little more. and make the T stand out more? I am not liking the way ESTABLISHED 2007 is handled here. Perhaps remove it all together, or try it in a different way (EST. 2007)