I do not buy that many games, and I'm a bit picky so generally what I buy turns out not to be crap.
Same here, I treat iOS like any other platform any only buy things I will play more than once / get a lot out of. I still have a load of games I don't play but they are purged from my device so I never get too tight on space.
My issue going forward is how many games are now pushing that 2gb limit, yet Apple are still stingy as hell on memory, charging a fortune for 32/64gb. I now think for anyone who wants to play any games that take advantage of the iPads power and screen that they should look at 32gb as a minimum.
COH, BG, MC4, IB2, PQ2, that's about 8GB alone.
We know IBDungeons etc... will be nearly 2gb as well.