I think this mod conflicts with Project Red. It causes Forge to freeze while loading the game just before entering the game's menu. Since it is a freeze I can't post a crash report so I'll provide as much info as I can.
As soon as I installed the Project Red files the game would freeze after loading. I would then remove a mod and put it back until I sorted out which one was causing it to freeze. Just removing Random Things caused the game to load properly without freezing.

Mods:

Random Things
DivineRPG
ArcanaRPG
MB_Battlegear2
Aether
AnimationAPI
Baubles
BuildCraft
CustomMobSpawner
MoCreatures
EnchantingPlus
GildedGamesUtil
HardcoreWither
iC2
InfernalMobs
MrTJPCore
MutantCreatures
OpenBlocks
OpenMods
Optifine
ProjectRed Base
ProjectRed Compat
ProjectRed Fabrication
ProjectRed Integration
ProjectRed Lighting
ProjectRed World
RogueLikeDungeons
RealisticTerrainGeneration
TLSpecialArmor
TravellersGear
TwilightForest
Balkon'sWeaponMod

EDIT: I'm pretty sure the problem is Project Red.