Everyone has their own opinions on tank decor - right down to those 'bubbling' divers and clams!
I always respect the opinions of others as I am a firm believer in sticking to whatever works for you as an individual.
I have tried live plants on many occasions and they have ended up costing me more money than what what they're worth.
I experienced the 'live plant' problems with - snails, being eaten, looking half eaten and scrappy, lighting problems etc - and in the end, I pretty much gave up.
I do believe that live plants do look more natural but I've yet to see a tank which looks as good as some that you see in books - perhaps specially prepared?
I now use plastic plants - though some of these as far superior to some others. I use the Hagen Aquascaper range and the likes of their Red Ludwigia can look especially good.
I have my Angels breeding in my garage and they lay eggs regularly on plastic Amazon Swords and Jungle Vallis.
My display tank also features plastic plants and they do the job of giving the fish shelter and something to swim behind and they do look good. I don't have to trim them, I don't have to worry about my fish eating them and I don't have to take out half dead ones and replenish them regularly.
One comment I will make is that the 'Plastic plant cleaner solution' which is available from Interpet, does not work as well as they say it will. 'Soak them overnight or for 8 hours - then rinse!' - no way. I tried this recently for the first time, even adding a double dose and I still had to revert to the old method of scrubbing them with a nailbrush to clean off the algae!
So Plastic or Real?
Real plants look more natural and do help with water quality, oxygenating and use up those nitrates - but they do come with their problems.
Plastic plants give a decent display and regular water changes will help keep nitrates down anyway. As long as sufficient aeration is provided, the fish don't notice any difference nor suffer in any way - the 15 years since I started using plastic plants is testament to that.
The choice at the end of the day is down to the individual and I wish everyone luck with whatever type of plants they decide to use.