Logo Concepts - feedback appreciated!

For a long time now I've used a text based logo and had no consistency with the type often changing from portfolio to portfolio!

I thought it's about time I came up with something a bit more brandable and I've ended up with this. It's a simple combination of the o and m, with the dots / grid effect relating to the dot grid book I use which features in pretty much any design project I do.

I'm by no means a logo designer, so feedback would be highly appreciated. I've attached a few different colour and type variations.