Play the Thieves guild or the Dark Brotherhood (or both) as a stealth character, but instead of plowing through everything, play gathering contracts (especially the thieves guild's minor contracts), and just have fun as a treasure hunter. Don't go jack of all trades, go rogue, and SPECIALIZE. Focus heavily on sneak, pickpocket, archery, speech, and put some minor points into one-handed, alchemy, and smithing. Argonian sounds GREAT for that. Never dive too quickly into a long storyline unless you feel up to it, and instead explore dangerous areas you may be ill-equipped to handle. Avoid the main quest like the plague, and the moment you get your first shout, abandon it entirely. Play on Master difficulty to make it feel like you are inferior, and getting ganged up on is a death sentence. Travel the world, stealing from who you please, and helping those who you feel deserve help. THAT should give you a very specialized and very specific mode of play. Heck, the majority of your time wont even be spent dungeon-delving, mostly because it'll be too dangerous. It'll be spent around towns, and exploring underwater. Stalking marks from underwater, and using lakes to avoid the guards should be extra fun as well. Your main goal is to get a nice house, a lover, and then work your way up the financial food chain until you own fully-built property in all of the holds, collecting rare trophies along the way.