So, what's the problem with being a sorcerer and choosing spells that fit your concept? You don't get that many spells anyway, so it shouldn't be too hard. Also, nothing is preventing you from taking spells that don't necessary relate to your concept and reimagine them to do so, even if it's just fluff (for example, taking the Shield spell and making it look like a small storm cloud that hovers in front of you). You can also ask your DM if the damage spells you take can do Electricity damage instead.
The stormbound bloodline isn't that bad. The first power lets you up the damage of your melee friends ("let the power of the summer storm flow through you!"). You also have the Elemental (Air) bloodline.
Good luck!
Well it's not necessarily a 'problem', as much as it is that it would likely nerf the crap out of the class in general since they function on the idea that you'll use the utility stuff more in most cases, and I don't mind reflavoring but theres a point when it might seem a little much to try and 'theme' spells with no evidence to a theme, but I may very well ask him about the just changing damage types thing heh.
and no it's not 'bad' persay, just very underwhelming, like I would imagine giving shock is nice, but it's kinda redundant when they would probably just already HAVE a shock weapon in case it was needed, it feels like a stormborn isn't any better at Lighting Bolt then an arcane, other then being able to do a free one 1/day. Sorta feels like if every time the Fighter got mad he said "I fly into rage", and it's the same as their barbarian friend, but he just gets to do it once more then the other guy.
and thanks, both for the luck and reading through my inane ramblings lol