Project Cars FTW

moto gp series.

I think GRID Autosport is one of the best Dirt Rally is also! Codemasters making the best Driving and Racing games!

NFS Most Wanted from 2005, also like Split Second + Trackmania Nations/Forever

for motorcycle racing definitely ride 2. i also liked motogp urt 3 although it is 10+ years old, at the time it was the best, now it's a bit outdated.
haven't played much car racing games, but i definitely liked nfs carbon, and new most wanted. hot pursuit 2 from early 2000s was great at the time also.

i loved the need for speed series, probably most wanted

For easy arcade I would choose The Need for Speed or Burnout, for more simulated games, The Crew, Asseto Corsa, Forza.

Need For Speed, got to be!

Burnout Paradise and Flatout series because I love demolition derby type games.

NFS Most Wanted and Hot Pursuit would be a more normal one I loved.

Need for speed underground 2... god this was amazing