As a sustainable advocate, I would always prefer to use an aggregate as these allow for natural penetration of any rain that falls on site. Complex drainage systems aren't required to take runoff from the paved driveway and so the end result to me is not only totally sustainable but is cheaper. And if you plant trees down the side of paved driveways, the paving or cobbles too often lift and become walking hazards. Burglars also don't like aggregates!

I like the bricks in the fence and you don't want to paint or render this, as you would be providing a lovely, fresh canvas for graffiti 'artists' to scribble on your walls. However, you could create a border area just in front of the fence and plant some shrubs or narrow trees. (Just saw a segment on Catalyst on the ABC the other day on types of trees which help to filter out pollution from your home. Silver birch trees seemed to do well, whilst taking up very little space and being quite sparse.) Even a border of mondo grass would be good, though this is very short in height.

Try diggers paint brush restorer. Small patch first, you don't want it to spread it. Failing that there is a company called So Safe. It produces graffiti remover and will get rid of that in minutes. My guys use a lot of it with very good results.

Probably not a bad choice actually. We'll be seeing a lot more of these permeable driveways in the not to distant future as they reduce rainwater run off from our sites into our gutters. Use a combination of both concrete and permeable perhaps. Such as where you park the bike on its stand or do bike maintenance use concrete. There are other permeable pavers available as well as these ones, council's use them a lot around parklands, trees in footpaths.