I base plant selection on the type of fish I'm keeping. I usually go for plastic just because it's easier. With "eartheating fish" I don't bother with plants at all. Although there are some fairly realistic looking plastic plants out there, I like the look of real plants better. I would only deal with live plants if the inhabitants of the tank were angels, smaller characins etc. but that's just a personal preference. Even then, I would go with only hardy, common and easy to keep plants like anacharis. Aquascaping of any kind is always an appearance vs. maintainence vs. type of fish kept in the tank thing with me.