I think if your primary focus is cowboy-camping, a combination of floorless shelter (Tarp, mid or whatever) with a water-resistant und bugproof bivy is ideal for most conditions.
– In bugless nights, you can just leave the hood open and there's no mesh on your face (at least true for my TiGoat Ptarmigan bivy, but I suppose also for many other models).
– If there are some bugs, you can still cowboy-camp and enjoy the view, although impaired by the netting. If the netting on your face bothers you, most bivys have tie out points on the netting, so that you can get the mesh off your face with help of a tree, a pack or trekking poles. With a tent, you would be forced to sleep inside the tent in this situation – the bivy allows you to cowboycamp.
– Another advantage: If you wake up in a light drizzle, the bivy, although not waterproof, will protect your bag for the few minutes it takes you to set your shelter up.
The only disadvantage I can think of: If there are so many bugs that you don't only need bug-protection for sleeping but also for eating or hanging around before bedtime, a bivy is pretty small and not very comfortable.
Personally, I don't really like the other options: With something like the hexamid tent, I would hate the bugnetting catching all the dirt. That being said, I never tried one out.
With tarptents, it always bugs me that I carry more weight than necessary most of the time. I seldomly need a full bathtub floor and sometimes not even bug protection. Yet, a tarptent forces you to carry everything with you at all times. The upside is: Everything is in one package and setup is as simple as it gets.
A floorless shelter on the other hand lets you combine items as necessary for each individual trip. No bugs expected? Just bring the shelter and some polycro as groundsheet. Some bugs? Bring a bug-bivy. A hell lot of bugs? Bring an innernet such as MLD Serenity.
Another (personal) aspect that might also apply to you is that tarptents have a pretty 'tenty' feeling. I feel very cocooned and cut off from the outside world. I much prefer seeing what is happening around me. Bivying and tarping does that for me. I feel much more connected with nature. Or to say it in the words of Alastair Humphreys: "In a tent you are basically in a rubbish version of indoors. In a bivvy bag you really are outside. You feel the breeze on your face, look up at the stars before you sleep and sit up to a brilliant view in the morning."
As I said, this is my personal opinion, your experience might differ.