Dawn had as much "funny moments" as the other girls and was as much as friend to the others in the group as the other girls if not more... seriously...
The Pachi thing mentioned above - if anything, it showed she's doubting HERSELF, not her friends... when one gets totally depressed and think he failed, sometimes he may act on impulse like she did and won't be so calm and collected to say "oh, let's talk with my friends about it before I act"
Also, "Iris trusts her friends and talks with them"? really? same girl who refused to tell her friends about her goal until she was forced to do it... same girl who's main relationship with Ash is based on calling him a kid when he's doing something "stupid"
Oh, you know what? I said everything I had to say, so if anyone is interested in my opinions, feel free re-reading my posts in this thread, cause if I'll continue replying here I'll end up repeating myself again and again and I really can't bother anymore