diff --git a/lib/ansible/constants.py b/lib/ansible/constants.py
index 46a08c758d1..b79b27173b6 100644
--- a/lib/ansible/constants.py
+++ b/lib/ansible/constants.py
@@ -196,8 +196,8 @@ MERGE_MULTIPLE_CLI_TAGS = get_config(p, DEFAULTS, 'merge_multiple_cli_tags', 'AN
 DEFAULT_DEBUG             = get_config(p, DEFAULTS, 'debug',            'ANSIBLE_DEBUG',            False, value_type='boolean')
 DEFAULT_VERBOSITY         = get_config(p, DEFAULTS, 'verbosity',        'ANSIBLE_VERBOSITY',        0, value_type='integer')
 DEFAULT_HOST_LIST         = get_config(p, DEFAULTS,'inventory', 'ANSIBLE_INVENTORY', '/etc/ansible/hosts', value_type='path')
-DEFAULT_ROLES_PATH        = get_config(p, DEFAULTS, 'roles_path',       'ANSIBLE_ROLES_PATH',       '/etc/ansible/roles', value_type='pathlist',
-                                       expand_relative_paths=True)
+DEFAULT_ROLES_PATH        = get_config(p, DEFAULTS, 'roles_path',       'ANSIBLE_ROLES_PATH',       '~/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles',
+                            value_type='pathlist', expand_relative_paths=True)
 DEFAULT_REMOTE_TMP        = get_config(p, DEFAULTS, 'remote_tmp',       'ANSIBLE_REMOTE_TEMP',      '~/.ansible/tmp')
 DEFAULT_LOCAL_TMP         = get_config(p, DEFAULTS, 'local_tmp',        'ANSIBLE_LOCAL_TEMP',      '~/.ansible/tmp', value_type='tmppath')
 DEFAULT_MODULE_NAME       = get_config(p, DEFAULTS, 'module_name',      None,                       'command')
@@ -316,8 +316,10 @@ DEFAULT_CONNECTION_PLUGIN_PATH = get_config(p, DEFAULTS, 'connection_plugins', '
                                             '~/.ansible/plugins/connection:/usr/share/ansible/plugins/connection', value_type='pathlist')
 DEFAULT_LOOKUP_PLUGIN_PATH     = get_config(p, DEFAULTS, 'lookup_plugins', 'ANSIBLE_LOOKUP_PLUGINS',
                                             '~/.ansible/plugins/lookup:/usr/share/ansible/plugins/lookup', value_type='pathlist')
-DEFAULT_MODULE_PATH            = get_config(p, DEFAULTS, 'library',            'ANSIBLE_LIBRARY',        None, value_type='pathlist')
-DEFAULT_MODULE_UTILS_PATH      = get_config(p, DEFAULTS, 'module_utils',       'ANSIBLE_MODULE_UTILS',   None, value_type='pathlist')
+DEFAULT_MODULE_PATH            = get_config(p, DEFAULTS, 'library',            'ANSIBLE_LIBRARY', 
+                                            '~/.ansible/plugins/modules:/usr/share/ansible/plugins/modules', value_type='pathlist')
+DEFAULT_MODULE_UTILS_PATH      = get_config(p, DEFAULTS, 'module_utils',       'ANSIBLE_MODULE_UTILS',
+                                            '~/.ansible/plugins/module_utils:/usr/share/ansible/plugins/module_utils', value_type='pathlist')
 DEFAULT_INVENTORY_PLUGIN_PATH  = get_config(p, DEFAULTS, 'inventory_plugins', 'ANSIBLE_INVENTORY_PLUGINS',
                                             '~/.ansible/plugins/inventory:/usr/share/ansible/plugins/inventory', value_type='pathlist')
 DEFAULT_VARS_PLUGIN_PATH       = get_config(p, DEFAULTS, 'vars_plugins', 'ANSIBLE_VARS_PLUGINS',