Maybe I am not doing it right, but it seems like the leveling up in Witcher 3 isn't as quick as some other games I play.  Not a huge deal, but I am also noticing that I am running into more bad guys that are whooping my ### as I run around.  I played for about 4 hours and went back to White Orchard to take care of a bunch of ?s and stuff on that map.  I am in the second area now, but I am still only at level 4 and I am encountering groups of baddies that are 8-9+.   Still having a blast, it's just something I noticed.  
Also, I spent 6 points to level up with fast attack and Igni.  I played for about 3 hours before I realized that you have to assign traits that you want, so I wasn't getting those benefits.   

   I have 2 or 3 more points, but still can't decide what to use them on.  I currently am using both versions of the viper swords with a stone in each.