BuddyPress.org

@famous
Try this just make sure you follow the instructions in the commented code. Place it in bp-custom.php :

/* Redirects to profile upon login, and upon logout redirects to activity page unless changed in line 6 */
function bp_help_redirect_to_profile(){
 global $bp_unfiltered_uri;

 $bphelp_my_home_page = 'activity';  // WARNING: make sure you replace 'activity' in this line to the same thing you set dashboard/settings/reading front page to.

 if ( !is_user_logged_in() && ( $bp_unfiltered_uri[0] != $bphelp_my_home_page ) ) 
  bp_core_redirect( get_option('home') );

 elseif( is_user_logged_in() && ( $bp_unfiltered_uri[0] == 'activity') )
	bp_core_redirect( get_option('home') . '/members/' . bp_core_get_username( bp_loggedin_user_id() ) . '/profile' );

}
	
add_action( 'wp', 'bp_help_redirect_to_profile', 3 );