There's nothing wrong in that. It's human nature to be attracted to someone's looks as well. Anyone who tells you "oh personality matters this and that" is a load of bull. First thing some one notices in someone is how they look. It's a harsh reality of the world. Looks matter, however they're not the
only thing that matter. Once that initial physical attraction dims down, it is of course your respective personalities among other things which hold you together. So I'd say you're not in the wrong at all for desiring some one who looks pleasing and not settling for some one who looks average or below your standards.
Your family's conditions are quite strict and numerous. Wow, all my mother wishes is that she be of Pakistani origin. Doesn't matter to her if she's Pakistani Canadian, or from Pakistan or Urdu speaking or Punjabi speaking. You live in Canada right? I'm guessing Toronto. There's a huge Pakistani diaspora here in Canada and it shouldn't be too hard for you to find someone of Pakistani origin. If I were you in your position, I'd probably not rush anything and find a good-looking Pakistani girl right here in Canada. It would solve a number of your problems i.e. Pakistani origin, of your liking, good-looking, educated etc etc.
Now, the only problem with that would be convincing your parents. And this part shouldn't be too hard. As much as you're parents think they know what's best for you and think by imposing all those said conditions they'll be helping you, but if you present them with a Canadian Pakistani bride of your choice, they will
eventually come around. No matter how much they may reject it at first, or put up a resistance, trust me, I'm sure they love you way too much and will eventually come around.
I know this first hand. My older brother who is turning 24 this December was to be married to our first cousin, just like you. To add to this, they're marriage was decided when my brother was very young, say 5-6 years old. Now as you can imagine, as he grew older, he came to know the difficulties that surround first-cousin marriages with respect to the offspring. Among other things, just like yourself, he wanted to be married to a women of his liking, educated etc etc. Now, initially when he disclosed this to my father he was VERY upset because he had given his word to his sister. My mother however remained supportive. And just like in your case, our relatives back home started bickering and gossiping and talking trash and what not. Believe it or not, at one point this created divisions in our family (not immediate family) but our extended family back in Pakistan. However, as my brother remained adamant, and rightly so, my father gradually and eventually gave in and broke off the union. My father's sister was quite mad with all that transpired but she had no choice to move on as well.
Fast forward a couple years, and my parents are now in my brother's ear to find someone of his choice to get married. He's only 23 right now, so he does have time before my parents really start giving him an earful on a constant basis. But what's important is that they've stopped insisting him to marry our cousin.
You're 30 now and it's certainly a cause for concern that you haven't been at the least engaged yet. But, you still have at least 2-3 years before things get REALLY serious an dire. So yes, you should be looking around.
And really, about the bickering and stuff from your relatives, it's not going to stop until you're finally married. I know it's annoying but you can't control what they say but what you can do, is filter them out of your conscious and focus on you. They can talk all the craap they want but at the end of they day you need to do what's best for you. I'd, and I'm sure you as well, would like to find someone who you can connect with on a physical and intellectual level and spend the rest of your life with.
I guess the bottom line of what I'm trying to say is that, who cares what anyone else thinks about you and how you're not married yet. You need to do you, and find someone you like, because eventually your parents will come around and will accept her. Granted that whoever she is, isn't too far off from what your parents desire. i.e. An African Canadian

And finally, good luck to you.