The reason I like no theme is because the theme selections on Blackberries are horrendous and I say this with my love for Blackberries. Blackberry themes are truly horrendous and they look absolutely appalling. The visuals and execution of these themes are mediocre even for the paid themes. I come from an iPhone and Android and they have plenty of eye candy that makes me drool. Blackberry on the otherhand, not so much. That being said, I love my blackberry to death because at the end of the day, the stock theme looks professional, gets the job done, and is a power horse. I'm a crackberry.
I understand your statement regarding eye candy when it comes to Android themes. There are huge numbers and it's not necessary to root.
But iPhone? You must mean jailbroken iPhones. And not everyone chooses to jailbreak. I don't.
I use the small banner theme created by Lucky. It has no bugs, no memory or battery issue what so ever. I used this theme even on OS 7.0 and now I am on OS 7.1.
I absolute love p'9981 stock theme... It is another alternative if you are bored with the stock theme on 9900/9930.. But the only catch is that it is not available for OS7.1..
I have used the Mini Banner one for the last month or two. Just went back to stock just to have something 'different' again. I change wallpapers every now and then... the BB leather is usually choice.
Themes?? What themes? There are no themes for OS7 phones. All there are are minor tweaks to banner size and real estate. No icon changes or anything different from what the stock themes are.
I miss the old days when you could change everything. There were some great theme developers out there but RIM has pretty much put an end to custom skinning on newer blackberry phones.