DVD Format / Brand

I have an LG GSA4167B DVD burner which, according to spec is compatible with all (?) DVD formats. From limited experience I have noted much more consistent results from DVD -R discs than with DVD +R. Unit either doesn’t recognise presence of disc or goes through the motions with no result. As I say this is based on a limited sample but:

  1. Is there a format that ourperforms others or Have I just been unlucky
  2. Is there a brand of DVDs that anyone recommends above others? (OK I am a cheapskate, just bought the cheapest = is this unwise?)
  1. DVD-RAM, then all others.
  2. TY and Verbatims. The cheapeast -> into the trash.