I think the problem with a poll like this one is that you are trying to design a study to support your conclusion. That is dangerous territory scientifically speaking. One must always attempt to be impartial when designing a poll.
As the poll stands right now, what are you going to gain from the results? All you will get is how old a keepers oldest snake is and what it lives in. That has nothing to do with how long the snake is ultimately going to live. For example, my oldest BP is 4 years old and lives in a tub. How does that give you any information about whether tubs are better than tanks? The problem here is that to really compare a tank to a tub you would need many matched pairs of BP's and then a 30 or 40 year study.
Basically we know that most people here have younger snakes and, unless I'm mistaken, most of them keep their snakes in tubs. Brush up on your statistics paying special attention to factors that can introduce the many types of bias in polls, come back with a well designed poll, and maybe we will see some statistically significant results.