Compact our checks.

src/main/java/com/gmail/nossr50/datatypes/player/McMMOPlayer.java

@@ -650,11 +650,7 @@ public class McMMOPlayer {
      * @return Modified experience
      */
     private int modifyXpGain(SkillType skillType, int xp) {
-        if (player.getGameMode() == GameMode.CREATIVE) {
-            return 0;
-        }
-
-        if ((skillType.getMaxLevel() < profile.getSkillLevel(skillType) + 1) || (Config.getInstance().getPowerLevelCap() < getPowerLevel() + 1)) {
+        if (player.getGameMode() == GameMode.CREATIVE || (skillType.getMaxLevel() < profile.getSkillLevel(skillType) + 1) || (Config.getInstance().getPowerLevelCap() < getPowerLevel() + 1)) {
             return 0;
         }
 

src/main/java/com/gmail/nossr50/listeners/BlockListener.java

@@ -131,11 +131,7 @@ public class BlockListener implements Listener {
 
         Player player = event.getPlayer();
 
-        if (Misc.isNPCEntity(player)) {
-            return;
-        }
-
-        if (player.getGameMode() == GameMode.CREATIVE) {
+        if (Misc.isNPCEntity(player) || player.getGameMode() == GameMode.CREATIVE) {
             return;
         }
 
@@ -208,11 +204,7 @@ public class BlockListener implements Listener {
 
         Player player = event.getPlayer();
 
-        if (Misc.isNPCEntity(player)) {
-            return;
-        }
-
-        if (player.getGameMode() == GameMode.CREATIVE) {
+        if (Misc.isNPCEntity(player) || player.getGameMode() == GameMode.CREATIVE) {
             return;
         }
 

src/main/java/com/gmail/nossr50/listeners/PlayerListener.java

@@ -279,11 +279,7 @@ public class PlayerListener implements Listener {
     public void onPlayerInteractLowest(PlayerInteractEvent event) {
         Player player = event.getPlayer();
 
-        if (Misc.isNPCEntity(player)) {
-            return;
-        }
-
-        if (player.getGameMode() == GameMode.CREATIVE) {
+        if (Misc.isNPCEntity(player) || player.getGameMode() == GameMode.CREATIVE) {
             return;
         }
 
@@ -342,11 +338,7 @@ public class PlayerListener implements Listener {
     public void onPlayerInteract(PlayerInteractEvent event) {
         Player player = event.getPlayer();
 
-        if (Misc.isNPCEntity(player)) {
-            return;
-        }
-
-        if (player.getGameMode() == GameMode.CREATIVE) {
+        if (Misc.isNPCEntity(player) || player.getGameMode() == GameMode.CREATIVE) {
             return;
         }