read my analysis of form 6 science stream here: http://forum.lowyat.net/topic/858464#

The best thing about form 6 is you can learn to adapt to difficulties sooner. University life will be easier. Like the famous chinese saying "bitter first sweet later".

If you are lazy, go for form 6. Peer pressure and long syllabus will passively make you rajin, unless you are immune to those. Just treat your form 6 life as your self-boost training.

If your result is good, you can apply to most of the prestigious uni, like cambridge.

Yes. Follow the rule please if you want to go form 6. Most of the Form 6 school have strict rules, imo.