You could do everything I, personally, dislike--you could send me a paper form query without my name attached; you could spell my name wrong; you could know nothing about me beyond the fact that I have the word "agent" on my business card--you could even (goodness help you) call up to tell me all about your cat.
But if the writing is good, I'll forgive you. And still want to work with you.
* I was so good about this--you'd think I'd given up blogging for Lent--that I didn't even post a "Wait! I'll be gone! I am getting closer to back on manuscript track!" post because I thought it'd hurry me along. Ha. Incidentally, I've had a lot of great work come in and am more behind than ever.