SnG Table Selection: What do you do?

[tipperdog]

I'm very curious how others practice table/game selection for SnGs at the 55-109 level, if at all. Personally, I just don't. If I see an empty seat at my preferred limit, I take it.

It seems to me that if you join the table first, you might not have time to back out (if you determine that you want to) as the seats fill up so quickly. Conversely, if you spend a minute looking up records on your potential opponents, the seat will fill before you've made up your mind.

I'm very curious what others do and believe this is an under-discussed topic. For all you regulars out there:

Do you practice table selection?
If so, what do you look for and what tools do you use?
Generally, how important do you believe table selection is for SnGs, and does the importance vary by buy-in level?