Hi Sylvia! Great blog, btw! I think a shoulder-length - just past nape of neck - bob with fringe bangs would work for you, perhaps slightly angled longer in back (as you mentioned you have an 'oblong' face - which I don't really see, but anyway!) And definitely go for a bold colour! Fun!
The cut would be long enough for a ponytail (important to you), but clean and sophisticated enough to match your fashion forward style! It's crucial to find a very good stylist - if she/he gives you a precise cut, styling it everyday will be so easy - and it sounds like you are not one who loves to fuss and fight with her hair daily! (I'm the same!) Low-maintenance, high style cut is important then! A quick google search for bob hairstyles yields many pics to consider - just keep yours shoulder length:
http://www.google.ca/search?tb......r_gc.r_pw.,cf.osb&fp=76765ad43f33bfd1&biw=1024&bih=677
Second, I'm not sure what hair products are available in Singapore, but be on the lookout for "texturizing cream", "anti-frizz cream" and "finishing cream" (preferably with humidity-fighting power!). All of these will help tame the frizzies and style hair easily when dry, and add a nice soft finish. Good luck - and can't wait to hear what you decide to do!