Depends on what your side is like in terms of ability aswell, if you've got a young team that are learning dont let them bowl first and get carted round the park week in week out, so if your league has a massive difference in points between draws and wins it can make a big difference. If your a side looking for promotion or to win a league it's sometimes best to chase, this stops a side dropping anchor and costing you points through a draw, we had one side last year who put us into bat first, we posted a good total and right from the start they weren't interested in chasing it down, we ended up getting a winning draw which gave us 16 points instead of 20 and for their efforts they got all of 1 point!