Quite clearly there are a whole lot of people voting for Skyrim without giving their reasoning. I guess that's to be expected in the Skyrim forum though.
If we're giving reasons:
Why Vegas?-Your choices matter. You can fight a battle in the southeast and some random guy in the west will tell you he heard about it, compliment you and offer that you join his clan. EVERYTHING is tied together and every action you take has a reward and/or consequences
-Intriguing storyline. New Vegas basically pits the philosophies of capitalism, anarchy, democracy and dictatorship against each other and highlights their strengths and faults. The game is VERY well written, with factions typically representing a philosophical or political ideal, with those that DON'T acting as tools to challenge the philosophies of the other factions. Characters are deep and believable, likeable and hateable. Everything about the game is just very well-written.
-Factions! Maybe not an important point for everyone, but yes I want factions. Factions act as guidelines and example character styles for me to base my roleplaying on. New Vegas has a lot of factions.
-Weapon balancing. You don't just get a hold of Goldbrand or Umbra and ta-da, you have the best weapon. No, the best weapon is subjective, depending highly on your character's build and a bit on personal preference (for example, VATS vs. FPS or ironsights style) This helps each character feel unique, since not every single one of my characters is running around with the exact same weapon and armor set.
-Amazing character customization. The game knows to limit your perk count, but counters this by giving you higher-quality perks. Your perks define EVERYTHING you do and how you approach a situation, your SPECIAL and your traits govern what perks you can/should take and what your strengths and weaknesses are. You can't have a do-all end-all godlike character that's a master of everything; you have to choose, but the character WILL feel amazing at the path you chose.
-The BEST DLC package I've ever seen from a game to date. I finally felt like I got my money's worth, and Dead Money is easily my favorite DLC I've ever purchased of any game.
-In-depth dialog and character reactions. What I mean is, the game simply prepares for every reasonable player reaction. It rarely occured that the game gave me my dialog options and I didn't feel satisfied with the choices, as I had another response in mind. 99% of the time, my reaction was in there, and 99% of the time if I walked off the beaten path of a quest and did it my way, NPCs actually had dialog ready to react to how I did the quest.
-Amazing voice actors. Joshua Graham, Cass, Arcade Gannon, Boone, Raul, Mr. House, Legate Lanius, Ulysses, the entire Think Tank and Doctor Mobius....SOOOO many good, memorable voice actors that did an amazing job of portraying their characters and making them feel memorable.
-Nice music. This is subjective, but I loved the music.
-Fallout New Vegas started with a bang (you being shot), ended with a bang (a nuclear explosion)...They just did everything right. :celebration: