Haha love this topic!
Well my zed I have to plan my route, certain roads I can't get down as there's too much of a gradient difference, to hit a cats eye is nothing much like docwra it takes me a lot of time and effort to get her in the air.
Speed bumps, if their the small ones across the road/ square blocks/ across the road in one piece but high entry, forget about it. If they allow the back wheels to get on or I can go sideways across then I can get away with it.
A mates estate I can only get across one speed bump, rest of the time it's two wheels on the pavement and two on the speed bump.
Drove round Liverpool the other night and it was mayhem avoiding sunken grids/potholes/ poorly repaired Tarmac. I didn't think mine was that low either, I've had to raise it a tad to get it onto the new drive way and have to take the same route on and off or else she's like a beached whale on steroids!
Pics can't get photo bucket to upload but tknutter on Instagram and there's a few on there.
Edit: what size wheels are you all running while being low? I'm on 18"s