Some of these are fantastic. Really great stuff here.
My only problem would be that they can appear too bright, and hence become very flat. Depth is a very important aspect to a tag, and you should definitely try and ensure there is sufficient depth to every piece. Tone down the brightness in places, and add some shading in areas of the tag that aren't the focus, and that alone can give you some great depth.
This piece is pretty good for showing some depth; the focals are bright, the background darker and it gives the piece some depth. That's pretty much all there is to it, but build on that, and try and be creative with how you create depth too, and it can create some very interesting effects too.
I would also say try and be a bit more dynamic with your tag sizes. The more static ones are good, but you can definitely make the moving focal tags more explosive if you were to narrow them for example. Try out different sizes and see what works.
Otherwise what you have here is amazing, and I can't wait to see what more you'll show us!