Majority of bloggers display posts in more or less them same way on the home pages of their blogs. This is understandable since WordPress does not feature a default option to define how posts should be displayed. Fortunately, you can surmount this problem by using custom fields. To define posts in your home page, you can use either the full post…

wp_define_posts.php

<?php
if (have_posts()) :
 while (have_posts()) : the_post();
  $customField = get_post_custom_values("full");
  if (isset($customField[0])) {
   //Custom field is set, display a full post
   the_title();
   the_content();
  }else{
   // No custom field set, let's display an excerpt
   the_title();
   the_excerpt();
 endwhile;
endif;
?>