This will hide any reblogs on your Tumblr dashboard.
// ==UserScript==
// @name Hide reblogs from Dashboard v2
// @namespace https://greasyfork.org
// @description This will hide any reblogs on your Tumblr dashboard.
// @author yamavu
// @homepage https://greasyfork.org/scripts/3140-tumblr-com-hide-reblogs-from-dashboard
// @include http://www.tumblr.com/dashboard
// @include https://www.tumblr.com/dashboard
// @include http*://*.tumblr.com/*
// @grant GM_addStyle
// @run-at document-start
// @version 1.02
// ==/UserScript==
(function () {
GM_addStyle('.posts .is_reblog {height:10px; !important; } .posts .is_reblog div{display:none !important; }');
}) ();