The most obvious base to use is double crochet (SC-USA).
Starting with the basics this is Surface Chain stitch. I talked about that in this POST.
Then I tryed Surface Zigzag Chain. Find that in this POST.
The last example is what I called Surface Double Crochet Spike stitch. You'll find the instructions HERE.
I've used two different versions of Surface Zigzag Chain stitch. The Tunisian fabric makes a very flexible base making it easy to put the stitches exactly where you want them. It was easy to make the rows of zigzag stitches very close together. Compare this one with the red/purple one made on the Double Crochet base.
For the second version I made longer stitches. The instructions are in this POST.
Filet makes an excellent base. This is chain/Treble (DC-USA). Having worked this sample I now realise that it is better to use a smaller hook size for the filet than the surface work! I've used Scheepjes SoftFun, a cotton acrylic yarn with plenty of body.
In this sample I've worked mostly Surface Double crochet stitches vertically. Find out how to do that in this POST. In the white row I've used Surface Chain stitches, but I've double the yarn up in order to make the stitches more substantial. I think I prefer the chain stitches, what do you think?
Making the connection between the surface crochet samples I've shown you over the last few months and some practical crochet does take a leap of faith. I hope that these few examples have helped to bridge that gap. I am now buzzing with ideas and plan to give you a few patterns soon. However I do have to admit to being the slowest crochet designer in history so please be patient!!