Most combat in skyrim is rather poor and most quests are the same (this is my opinion, if you disagree/agree feel free to post about it but please don't attempt to turn this into a really devoted fan vs 'hater' thread, and whatever you do try to post in a civilized manner)... there are however a few moments of triumph were it feels like you achieved something great, if you have experienced any particular best moment in Skyrim please post it.
If it's a spoiler please use a spoiler tag or make it clear that reading further (Large, red, warning text), thanks.

Here's one of mine:
I'm on my low level Redguard assassin, I've just made it to the end of an extremely easy and long dungeon, all I've had to deal with were two vampires I managed to assassinate before they saw me, and a few skeletons (god skeletons are weak in Skyrim) here and there. But now I'm at the end of the dungeon, only to realize that in front of me, on a small cliff (don't know how else to explain it) stands a master vampire, even though I'm in sneak he has somewhat spotted me (he is searching for me), so as he gets near me I recall earlier in the dungeon, eating some ingredients in order to decrease my weight, while I did that I noticed that vampire dust turned me invisible, I had a feeling I'd need this later and I was right, after eating a piece back then I only had five vampire dusts left, as the vampire came near me I started eating the dust, I knew I had just enough dust for him to get past me if I ate a new piece right before the other one lost it's effect, I was right, I managed to (with 1 dust left) stay invisible until he got past me, the last dust ended the second I ended up behind him and I then snuck up to claim my loot, to be honest there wasn't that great loot and I was pretty disappointed until at the very end I found a word wall with my favorite shout... the end... (yeah this likely sounds like it was pretty boring, but trust me, when I got past that master vampire I felt as if I had cheated death...)

I beat an Elder Fire Dragon with the Deadlier Dragons mod at night. At first all I could see was black wings silohuetted against the cold stars, and I thought it was a bird, but then the night turned to day as fire erupted all around me.

Now, that blast nearly killed me, but I survived and I began to engage, exchanging blows, and after only a few seconds, I was nearly dead again, so I changed tactics, instead of fighting this monster on the barren tundras near Whiterun, I jumped back on my horse, and I charged towards the mountains.

I was halfway to the mountain chain near Labrynthian when the dragon killed my horse, I could not make it to the mountain, so I decided to use the rough rocky terrain to my advantage. I hid behind rocks, and I kept on avoiding the monster, only making one or two slashes before he could hit me again. This continued for two or three minutes, and I was out of health and out of options. The Dragon had lost half health and I was nearly dead. So, as the dragon blasted fire at the rock I was hiding behind, I decided on a final charge.

This last stand though, won the day, as I was gifted miracuosly by a kill animation in my favor, somehow I had managed to either glitch my way to victory, or I was the luckiest man alive.

Still, that desperate moment hiding behind the rock, staring at the mountains that would have given me cover and safety with longing as they were just out of my grasp, goes down as the most epic moment in all of my gaming history.