I was level 24, gained through just exploring.

It's always the same when I play these sorts of games, Oblivion, Mass Effect etc, I love the sidequests, exploring etc and spend ages doing those, the main plot usually never interests me as it nearly always makes an "open" feeling game become linear as I know this is the path to the "end" of the game.

At least Skyrim doesnt have those bloody oblivion gates, i hated those, so boring and logwinded, "oh great, up ANOTHER tower and grab the magic 8 ball, same as before then?, maybe this one wont have the same type of bad guy in it....nope, they're the same)

4 or 5 on my Bosmer, same with my orc and Altmer.

As soon as possible, especially on new characters since i want the house in Whiterun

I was 14 on my latest one. I got the house in Windhelm first, so I didn't really care about Whiterun.

3.

Like level 12 i think.

40-41

Probably about Level 4 but I didn't kill it... I hid in the tower while the guards killed it and then I got its soul much to everybody's amazement. lol

10-15 not sure exactly, those first few levels blow by stupid fact. I did a little questing before I fought it, wanted to make sure I was string enough to survive a fight with a dragon.

First time with my sneak thief I was 7. My second char is a spell sword he didn't do it till 15

I think I was 13 or 14. did a lot of exploring around Whiterun, then did a few of the sidequests

I honestly cannot remember, though if I was to guess I'd say right below or right above 10.

i had killed him easily with a level 5-6 mage and now i just killed him with a lvl 40 assassin and it was VERY hard for me

Level 5 or 6. I hate dragon fights, they are so annoying and you have to pick up those heavy dragonbones ugh. Anytime I see a dragon I pray it keeps flying and doesn't bother me.