straight bets pay better in smaller fields as exotics don't pay even if fav. runs out; but exotics great in the larger fields, even on short prices. That being said which do you prefer to play if you had to choose???
I think playing fields of 7 or less is much better, too hard with big fields and anything can happen like horses getting trapped, ect. This goes for any type of bet and I believe also sticking to big tracks only, better horses.