Ive had all sorts, though mainly tshirts. I've also had, hats and gloves, mugs, a towel, etc All of which I use. At North Tyneside tenk on Easter Sunday I got- asics tech tee, reebok water bottle, cap,and two sis energy bars. On Saturday I got a specially labelled bottle of beer 9which I have drank and kept the bottle). I also love to look at my medals (possibly some smutty innuendo here). Basically I like all my mementoes, though I agree that there does seem to be an excess of t shirts in my collection, and some are better and get more use than others.
In short, I think it's important to get a race memento. Ive done loads of races but they all mean something, however large or small or whatever the distance.