Possible Problem:
was in creative earlier got a command block placed it put in the command for getting a custom head

later... turned off laptop
turned on

not able to load minecraft

as I enter Minecraft launcher 1.5.3 I hit play version 1.8 then soon after downlaoding I get an error message that brings up a new tab called gameoutput this is what shows in the text...

[16:56:56] [Client thread/INFO]: Setting user: crazycre8tive
[16:56:57] [Client thread/INFO]: (Session ID is token:53edcee7f7b0485f835097ec972083d4:5006141046494c4991442693aea008d0)
Exception in thread "Client thread" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.Gson.fromJson(Gson.java:815)
at com.google.gson.Gson.fromJson(Gson.java:768)
at ry.b(SourceFile:148)
at ry.<init>(SourceFile:42)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:155)
at cyk.<init>(SourceFile:40)
at bsu.<init>(SourceFile:282)
at net.minecraft.client.main.Main.main(SourceFile:120)
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.Gson.fromJson(Gson.java:803)
... 7 more
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

I have already tried logging out and deleting and re installing launcher also updating java

If you have any information or help please let me know I need minecraft to work asap