I remember:
Feeling lost in pre-searing ascalon.
Feeling awestruck (and lost) when seeing the whole post map (i thought you could explore it ALL)
Going out SOLO with my lvl 6 E/Me, with the skill bar a total mess (7 different attributes - see my first ever screenshot)

Not knowing you can shift your secondary as many times as you want and stayed as an E/Me for AGES because of it.
Thinking that soloing lvl 8 centaurs with my lvl 13 war was leet (had mending of course).
My first valuable drop (sup prot prayers rune, worth approx 12-14k at the time)
When we were the only heroes and had only henchies to go 'round with.
When sup abs and vigor were insanely expensive. then when I dropped one, they were already going down.
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On a side note: Anet, if you're watching this thread, realize how good old times were, and try to bring some of those things back. If you cannot/will not/whatever, DON'T DO THE SAME THINGS WITH GW2!!!