It's my personal opinion that the lower classes are where you'll find the best racing online.
This is very true.. There's a group of guys I usually race with that I met on Forza, good clean racing with damage on and we go up and down the classes, usually from D to A but we do go up through to R1 sometimes too, if we are on D / C class we rarely get anyone join and if we do 95% of the time they are a good driver and can race cleanly, as soon as we hit A Class though you get loads of people coming in and nearly always someone ends up getting wiped out on the first corner by the new guy flying into the turn at 100mph then saying 'oh I didn't expect you to brake'

Even worse is S and U class which is usually accompanied by an endless torrent of 'Do Speedway, Do Speedway!'
Ermmm.. no thanks, I get bored after half a lap...
R classes can be good too though as not many people seem to race them either and so again you can get some good racers join, especially in R4 although sometimes R1 does get the 'I wanna go as fast as possible but have no idea how to race alongside someone' loonys turning up...
I could go on (for hours probably

) about racing cleanly, letting people know you are alongside them and not turning in on people... but i'll try and be brief..
Racing is a lot different to hotlapping, you can't expect to take the racing line every time and its best to back off and follow someone through a turn if your not that confident in your driving or your cars grip, remember that real people get a lot more annoyed than CPU cars when you take them off the track...

Once you get the hang of it though and can race side by side with someone else it is the best racing you will ever have, a lap of Tsukuba side by side... now thats some intense racing!!!
Edit:- Just re-read this after posting, will now step down off soapbox and stop rambling...
