1. Traffic
2. Scooters and Bikes that make silly or illegal overtakes around islands and then get in my way further up in traffic or at lights. Mainly the scooters.
3. Similar to above but the odd cyclist that likes to ride in the centre of the road on the broken white lines.
4. Drivers that see you and purposely make it difficult to overtake by blocking you.
5. Drivers that poodle along at slow speeds in traffic leaving a massive gap between them and the car in front and not leaving enough room between them and the car in your lane so you can't jump into their lane in front of them, or overtake the car in front of you.
6. Similar to above but Black Cab drivers that poodle along too slowly
7. All mini cabs especially the Addison Lee ones. I often wonder if they have a UK license or any other license at all.
8. Buses and HGV's that pull into a junctions and blocking the traffic flow as lights change.
9. Speed camera's
10. Average speeds limits of 50 on motorways or A roads when there is no reason for it. So called traffic calming. It stresses me out.
That will do for now. I'm sure I could easily come up with another 10.

oh here you go...
11. Sitting at a Red light for 10 mins before it changes.
12. Lights that are not in sync or timed correctly so your forced to stop at every one.
13. No right turns so you forced to go straight ahead and do a U turn and get stuck at the light again.
14. Large queues at the till in the petrol station because the peole in front are doing a weekly food shop or buying a lottery ticket. I wish more garages would supply the staff and fuel only tills.
15. Being forced into having to have insurance. I have said this before but because it's a legal requirement Insurance companies can get away with keeping the prices high and rip us off. There should be a basic insurance cover no matter what you ride, say £100 set fee that everyone pays which gives basic cover. Any extra cover is extra.
16. Drivers on mobile phones who's driving standards deteriorate while doing so. like swerving out their lane. I could extend that to anything else like playing with the car stereo, drinking coffee or eating, skinning up, screaming at the kids on the back seat etc.
17. Lane hoggers on motorways when they could just as easily move across into the inside lane.
18. Manhole covers right on your line on bends or pulling out a sideroad or loads bunched together in one spot.
19. Pot holes and other bad road surface condition that make you either have to swerve or slam on the anchors.
20. Road layouts that are designed in such a way to catch you out as or trick you into, say, going into a bus lane where a camera is pointing at you as form of revenue making.
Just for the record I could come up with as many positives.
(:-})