In the grammar structure 又 [adjective] 又 [adjective], is there anything wrong with combining a negative adjective with a positive one? Question: In the grammar structure 又 [adjective] 又 [adjective], is there anything wrong with combining a negative adjective with a positive one?
It seems like it would make a confusing sentence to mix both positivity and negativity.  Such sentences might be better off being written using the grammar structure 虽然 ... 但是 ...  But perhaps they're perfectly okay.
Some examples I made up:

我的女儿又漂亮又淘气
My daugther is both beautiful and naughty
Wǒ de nǚ'ér yòu piàoliang yòu táoqì
这辆车又快又旧
This car is both fast and old
Zhè liàng chē yòu kuài yòu jiù
我的作业又难又有兴趣
My homework is both difficult and interesting
Wǒ de zuòyè yòu nán yòu yǒuxìngqù

The examples I've read never seem to mix negative adjectives with positive ones.  Some examples I &quot;borrowed&quot; from jukuu.com:

他有点成问题，又懒、又邋遢、又不讲卫生
Tā yǒudiǎn chéng wèntí, yòu lǎn, yòu lātà, yòu bù jiǎng wèishēng
他又高又瘦，穿得很差
Tā yòu gāo yòu shòu, chuān dé hěn chà.
这就是为什么糖块是又快又好的能量来源
Zhè jiùshì wèishéme táng kuài shì yòu kuài yòu hǎo de néngliàng láiyuán
她听说白兰德家族又有钱又有地位
Tā tīngshuō báilándé jiāzú yòu yǒuqián yòu yǒudìwèi
Question: In the grammar structure 又 [adjective] 又 [adjective], is there anything wrong with combining a negative adjective with a positive one


Yes, there's something wrong with combining a negative adjective with a positive one in the [又 [adjective A] 又 [adjective B] structure. 

The problem is -- You can't do that!

All the examples you made up are wrong. [又(A) 又 (B)] is equal to [(A) and (B)] in English. 


  (A) and (B) have to be both positive or both negative


Example:

(both positive)

[又(迅速)又(准确)] = [(fast) and (accurate)]

We don't say  "his punch is fast but accurate" in English ; We only say "his punch is fast and accurate"

~

(both negative)

[又(贪心)又(愚蠢)] = [(greedy) and (stupid)]

We don't say "this man is greedy but stupid" in English; We only say "this man is greedy and stupid"

~

(one positive, one negative)

[(迅速)但(不准确)] = [(fast) but (inaccurate)]

We don't say "his punch is fast and inaccurate" in English. For the same reason, we don't say "他的拳头又快速又不准确" in Chinese

[(贪心)但(守法)]= [(greedy) but (law abiding)]

We don't say "he is greedy and law abiding" in English. For the same reason, we don't say "他又贪心又守法" in Chinese