I didn't like Oblivion but I love Skyrim. People who already liked Oblivion will think the changes are smalll, but people who didn't like Oblivion will definitely care. I'll list a few changes. See if these matter to you:
-Combat is faster and more visceral due to an increase in damage, much better animation, and a much more active camera, adding weight to your blows. Similarly, magic is tied to your hands now instead of just shot off with face buttons, making it heavier and a more full-featured part of the combat. Third person view is now useful as well.
-Voice acting is now good, there are dozens of different NPC models so they aren't cookie cutter, individual stories of people and towns are fleshed out and full-featured, and side content is just as good as the main quest. You can make different decisions and do different quests on different playthroughs, dramatically changing the experience between them.
-The content in the world is better paced, and the world feels much more sculpted and alive (less like something that could have been made in a map editor).
-There are more activites you can do, such as mining, hunting, and crafting. Alchemy and Enchanting have both been improved as well.
For more detailed information, read my full review on gamrReview here: http://gamrreview.vgchartz.com/review/49112/the-elder-scrolls-v-skyrim/
