Blog Post- Which sentence types produce better writing?

I am in the process of beginning to write a fictional romance novel. 

An excerpt of this novel is a previous 'short story' submission which I have submitted to this site- entitled The Sitting Lady (see short stories-romance). 

I have already designed a basic plot structure for my entire novel- which will be considerably longer and include the necessary climax, denounement and ending.

I am unsure of the exact intended word length of the manuscript at this stage. 

However, as I have finished my last year of high school and have time on my hands I have decided to focus on using this time efficiently to produce a manuscript of the entire novel in about two to three weeks.

The reason for this short time frame is that I am very eager to explore online publishing options for my novel and actually publish it well before I go to Uni next year (don't want the project to drag on to the middle of the year when I am more busy as it probably won't get done). 

I am not interested in making a huge amount of money from my first novel- would be great if it happened- but more interested in having a published novel to my name as something- an achievement- that I can attach my writing portfolio for both my own sense of achievement and to showcase my worth for future opportunities in the future. So basically- just want to get the novel published for the reasons listed above, and hopefully building an audience for future novels/writing projects. 

I am currently reviewing the 500 or so words that I have written in over one day, and had a question to pose to this writing community. 

In romance novels, is it better to structure your novel in a basic 'him and her' introduction of the protagonists, or can it be a little mysterious and cryptic, with elements of their lifestyle together embedded in things such as figurative language (e.g. he had a coat as black as night is introduced before his eye colour. Or he is given a name but no other essential characteristics until say page 9)?

Feedback would be greatly appreciated :) 

Thank- you