The right Value % To bet on?

I was just curious as to what you guys think is too low of a percentage to bet on. Right now I bet on anything higher than 2% with a flat stake method of .75 of my $2000 bankroll. Should I keep getting on anything over 2% or strive to do bets over 3%

i do 3 % +

i do 5%+…sometimes i will take a 4,5%. But 90% of the time i will go with 5%+