Sam my friend I built about 7 guitars before it felt like old hat to me in terms of the construction aspects but that was only part of what I needed to learn - a very small part.........
I wanted a signature "tone" for my guitars and I was not going to find that unless I developed some designs for the things that are important to tone. For me this meant that my bracing needed to change from traditional bracing to some degree and I needed to learn to "voice" a guitar for the tone that I wanted.
By the 8th guitar I was trying new-for-me bracing ideas like parabolic bracing, thinner tops, larger bridge plates, and a bridge design of my own with several prototypes. Although my 8th guitar is IMHO my worst sounding guitar the 9th got better in large part due to an honest evaluation of the 8th..... and shortly I found my way with the new set of design elements that I employed.
People tell me that my last 5-6 guitars all sound like the same builder made them - I am not sure if this is a compliment or not........
But it is a sound/tone that I like, better than my early guitars, and some other things came together too for me.
I would recommend using the earlier builds to help you find your own way in terms of the kind of tone that you seek to produce. I would also recommend trying to limit the variables on each guitar so as to assist you in knowing exactly what changes that you made are having an impact on what you are hearing and feeling. Remember too that a guitar has a "feel" as well and I am not speaking of the ergonomics or playability - I am speaking of what the player feels in terms of vibrations on their body when they play your guitars. This is one of the reason that I personally am a fan of light weight guitars.
Lastly if I could do it all over again I would limit the woods that I used to the core woods of guitar building i.e. mahogany, rosewoods, spruce and WRC. I say this only as a way to again limit the variables in your building so as to assist you in knowing how your changes are impacting your success.
And really lastly and perhaps controversial here...... try to avoid building your dream guitar that may employ things like sound ports, cut-aways, etc. for a while. Learn to build a great sounding great playing simple guitar first before introducing complexity in the build process and things that could skew your evaluation of what results. Get the basics down.