cheanged default options

dios/options.py

@@ -70,11 +70,11 @@ class Opts:
 
 # set default values
 dios_options = {
-    OptsFields.disp_max_rows: 10,
-    OptsFields.disp_max_vars: 4,
-    OptsFields.mixed_itype_warn_policy: Opts.itype_ignore,
-    OptsFields.comparison_nan_policy: Opts.keep_nans,
-    OptsFields.setitem_nan_policy: Opts.keep_nans
+    OptsFields.disp_max_rows: 20,
+    OptsFields.disp_max_vars: 6,
+    OptsFields.mixed_itype_warn_policy: Opts.itype_warn,
+    # OptsFields.comparison_nan_policy: Opts.keep_nans, # fixme: not implemented yet
+    OptsFields.setitem_nan_policy: Opts.pdlike_nans,
 }