BioShock was decent and they did a good job on it, but it still wasn't as good as the first one. If you are into the series then it would be worth the buy. Honestly I am not to excited about Battlefield 4. You can check out the other thread here Battlefield 4
and see my reasoning why. I feel the same about the Grand Theft Auto series. They may add a few things to the new one but honestly I feel like you play one you play them all. My favorite was Vice City, probably because that was the first over the shoulder one with motorcycles.
The one I am looking forward to is Metro: Last Light. I love the whole post apocalyptic feeling in games. The first one was different and beautiful and hopefully the second one can stand up to that. If you haven't played the first one then I would say it's a must buy.
All the older games you mentioned are great but the one I would recommend getting out of all the ones you listed is Skyrim. It is an amazing game and you can do so much with it. You can probably find it on sale these days and you won't be let down because you can sink hundreds of hours into that game and still have more to do. It is one game where you truly get your moneys worth.