You must have a different understanding of what arrogance means because I don't see how Liz is being arrogant. She doesn't assume that Peter likes her and forces Peter to stay with her. She has followed the same pattern as any normal person would; she likes him and shows an interest, he in turn shows an interest in her and they both perpetuate it by continuing to show enthusiasm for each other. There is no arrogance here on either side.
Or maybe you don't understand what arrogance is. After Flash's injury, Liz calls Peter to wait with her. Then, when Flash appears she acts repeatedly like a b**** to Peter. She never apologizes to him for that, nor does she even realize she's done something wrong. THAT'S ARROGANCE. She breaks up with Flash and goes to Peter. She doesn't say: "I just broke up with Flash. Do you think you'd like to be exclusive?" She just just tells Peter that she broke up with Flash and ASSUMES that Peter wants to be exclusive. THAT'S ARROGANCE. Again, Peter is acting like a jerk here as well, leaving Gwen hanging while he's swayed by Liz's come on because she's (supposedly) hot.
People do not have to have lots of common interests to have a relationship; have you ever heard of the term opposites attract?
The opposites attract thing applies to sexual relationships, and quickly burns out. For anything to last with "opposites" common ground nust be found. And this doesn't apply here. This isn't a case of opposites attracting. They have nothing to be opposing. Again, Liz, having been with a total jerk like Flash is switching to the nice guy she can push around. It will also burn out. But again, the real problem is that Peter doesn't have the stones to stand up to her (Or really anyone). Not realistic for someone who's Spider-Man.
It's true that Peter and Liz do not have a lot in common but personality-wise their characters aren't too far apart and that's why they get along and have a relationship right now.
Their characters aren't too far apart now, in that she's a jerk and he's blossoming into a jerk.
Liz has only shown arrogance in the series at the start of season 1 before Peter leaves her at the coffee shop. From that point forward the viewer can see that Liz isn't an arrogant "popular girl" like Sally Avril.
I've explained above why Liz is arrogant. Sally isn't arrogant. She's a freakin' b****. But she's also just another cartoon cliche.
No I do think that this is the path the producers have chosen because they have effectively said so when discussing the extrapolation of the Gwen character for the series.
Then they need to get on the stick about developing this.
It's only been a couple of months since Gwen built up enough courage and put herself out on a limb by kissing Peter and he consistently undermined what she did by not taking action or saying something.
A FEW MONTHS? You kiss someone, they reject you and you're hanging on for a few months? That's not a strong character. That's a victim. And again this says then that Peter's "not that into her" or that he's a whimp and can't go for what he wants (Even after it's dropped in his lap), both being incorrect characterization for Peter. As Peter's being written he doesn't deserve a girl that really loves and is devoted to him.
Naturally Gwen would then retreat somewhat but not completely and the comment you mention about not being second choice is a good example as well as other actions taken this season. No one would expect her to suddenly change character overnight because that is completely unrealisti.
Faced with Peter's behavior, a strong girl like Gwen would move on. And I mentioned the "second choice" comment to point ot that Gwen is saying one thing and doing another. She SAYS she won't be Peter's second choice, but is clearly willing to be as shown when she was going to kiss him
again in the "Identity Crisis" ep. In fact, she was willing to be
less than his second choice, since Peter wasn't making any choice at all. He was just going to kiss a pretty girl. Guys do that all the time. And Peter
again doesn't step up. Like I said, this eter doesn't deserve Gwen.