The Elder Scrolls V: Skyrim is a first person action RPG with a huge open world. You play as a dragonborn and must fight to stop the dragons from destroying the world.
Pro Unrestrictive skill-based RPG system
Skyrim has no set character classes or equipment/spell limitations. Instead, it allows you to form your own class based on how you decide to play.
For example, sneaking increases your sneaking skill, hitting an enemy with a shortsword increases your one-handed skill, taking damage while wearing leather armor increases your light armor skill, and so forth. You can you play however you want and the resulting character will be a perfect match for your playstyle, giving Skyrim a different feel from other RPGs.
Pro Deep lore rivaling classic fantasy literature
Skyrim inherits the stories and world-building of The Elder Scrolls series, which stretches back 20 years. It has numerous stories surrounding the various races (orcs, elves, lizardmen, demons, etc.), mythical beasts, gods, cataclysmic events, parallel worlds, and just about any fantasy trope you could think off. What's even better you can read the lore in books found in-game, allowing you to immerse yourself for countless hours.
Pro Huge variety of mods
Bethesda Softworks has upheld a tradition of releasing their internal content-creation tools to the public since Morrowind (2002). Many modders transition to new Bethesda games as they are released, bringing their experience with them and helping newcomers through forums and wikis. As a result, Skyrim's mod selection is outstanding in both variety and quality.
Con Buggy and crash prone
While this game is not as buggy as it was upon release, there are still many people that encounter various bugs and crashes. These can happen in both modded and unmodded games and it's a common occurrence in Bethesda released titles. Fortunately, there are some community mods that try to fix most memory issues, stability issues, and general bugs.
Con Forgetful NPCs can break immersion
After completing certain story quests NPCs get new lines added to their dialogue based on your decisions. Sometimes the NPCs might become forgetful and return to their default dialogue, which can break immersion, especially if they talk about an event that's been long resolved.
Con Combat is too simple
Most of the time you can just whack an enemy until it dies and it involves very little strategy or planning to succeed.
For example, targeting specific body parts doesn't deal extra damage, nor can you cripple an enemy. There are no vulnerabilities, so you can't set furry forest animals ablaze easier than humans. The enemies also lack any real variation in how they attempt to fight you – they just run at you swinging wildly or attack you from afar.
Because of this the combat is very one-dimensional and can start feeling like a chore after a while. Luckily most of the combat issues can be fixed with mods, allowing you to enjoy a more varied and deeper combat experience.