sections -- personally, a long list of rules is a little off-putting to me. Of course, this begs the topic of weeding out the masses and addresses compatibility, but I prefer that be left to the discussion process, give and take on ideas and collaborate upon prompts. This process is often telling into how you might get along with someone and if your writing styles mesh. I don't really care to read "do's and do not's" that are often common courtesy, requirements of gender -- age I understand -- and so and so forth. To me, that could easily be covered in a "getting to know the writer" blurb, or as I've done, a small disclaimer. More or less a brief introduction that's telling enough about you in regards to availability and what to expect. Including plots, and prompts, is something else I like to see. I don't care for sectioned-bulleted "pairings" but often I regard these as potential cues rather than out-right requests to a romance requirement. Take what is given, and build upon that. 

imagery -- I'm beyond guilty of this. I've dressed up threads obnoxiously so, but I enjoy the process, and I'm not likely to change that. Now given the former, I've done such in a "minimalist" fashion; calming colours of grey, silver, black and white -- I find bright and lurid to be searing to the eye against the background of the guild -- and I'm fond of smaller text. Simple images, a small header cradled by a title, introduce a quote or so -- if you want -- and you're good to go. You want things that reflect and borrow from one another and go well in hand. Complex photographs pair better with basic texts rather than cursive and vice versa with simple images paired better with flowing scripts. Use one large header or smaller ones in a "power of three" format. 

build-up & organization-- a primary title followed by your selected image -- if at all, for even text can be manipulated in presentation, using header formats on top of smaller, accentuated texts -- or an image set upon a title. Images are telling but not wholly important, but if you build upon what is given, this shouldn't be an issue. People are rather lazy, so sometimes it's best to get straight to the point -- I've had to tell myself this -- and come down to a brief section about yourself and any specifics you might have and feel crucial to include. Follow up on prompts, plots, starting from most desirable and leading from there, indicate a preference if needed. I write my plot sections with key terms and themes and hide the rest away in a hider so as not to clutter the layout of my thread. Close it out with something brief and that doesn't distract away from what has already been written, miscellaneous information maybe that won't fit anywhere else.