Is this winning pattern unusual

[KenProspero]

First some background -- I'm a beginner (well advanced beginner). I find that when all is said and done, I'm beating 2-4 games for 2-3 big bets an hour, 4-8 for about the same, maybe a bit less. Low stakes NL games, I'm ahead, but really not enough playing time to make a statement.

Anyway, what I've noticed is that in general I'm playing even or losing slightly most of the time, but every session or so I hit the monster pot where I make all my money.

Is this usual? unusual? an indication that I'm just very lucky and need serious work on my game?

Wasn't sure of the right forum, but think that this was the right one.