Haha! I have a friend who always asks the same thing. Technically, they all request that you not put paper in the toilets. Our plumbing system here is not the greatest and things get backed up very easily.
Plaza Las Glorias and Caribe are totally different. Plaza Las Glorias has more of a larger resort feel to it, Caribe Blu is much quieter and has a small town feel to it.
The remodeled rooms at Caribe Blu have a rustic carribean decor and the non-remodeled rooms are just simple and comfortable. All rooms have private balconies, TV, phone, AC, room safe, and there is a small pool, small sandy beach area, small cafe/grill that has great food and prices, and thay have a small bar area where you can get beer and drinks.
I personally like the Caribe Blu if you want a quiet, comfortable, no frills hotel. However, if it was my honeymoon, personally I wouldn't consider Caribe Blu or Plaza Las Glorias...I would prefer something a little more upscale...but of course it is your choice. I wouldn't consider either of these hotels "romantic" although watching the sunset from the Caribe Blu is really nice.
I don't know if this was much help or if it confused you more...I hope it helped!