diff --git a/pacman-zfs-snapshot.sh b/pacman-zfs-snapshot.sh
index 88f825d..623fa5c 100755
--- a/pacman-zfs-snapshot.sh
+++ b/pacman-zfs-snapshot.sh
@@ -14,8 +14,8 @@ if [[ -r "${conf_file}" ]]; then
 fi
 
 # User-defined
-do_dry_run="${do_dry_run:-true}"
-important_names="${important_names:-linux}"
+do_dry_run="${do_dry_run:-false}"
+important_names="${important_names:-linux|systemd|zfs-(dkms|utils)}"
 snaps_trivial_keep="${snaps_trivial_keep:-15}"
 snaps_important_keep="${snaps_important_keep:-5}"
 snaps_trivial_suffix="${snaps_trivial_suffix:-trv}"
@@ -23,8 +23,8 @@ snaps_important_suffix="${snaps_important_suffix:-imp}"
 pkgs_list_max_length="${pkgs_list_max_length:-30}"
 snap_only_local_datasets="${snap_only_local_datasets:-true}"
 snap_field_separator="${snap_field_separator:-_}"
-snap_name_prefix="${snap_name_prefix:-pac}"
-snap_date_format="${snap_date_format:-%F-%H%M}";
+snap_name_prefix="${snap_name_prefix:-pacman}"
+snap_date_format="${snap_date_format:-%F-%H%M}"
 snap_op_installation_suffix="${snap_op_installation_suffix:-inst}"
 snap_op_remove_suffix="${snap_op_remove_suffix:-rmvl}"
 snap_op_upgrade_suffix="${snap_op_upgrade_suffix:-upgr}"