This changes from year to year. Right now, its the discovery and analysis of the infrared emission from galaxies at 140 and 240 microns, and in the investigation of the clustering of distant galaxies by the measurement of their infrared light at wavelengths between 1 - 5 microns. Next year, my interests may move on to some other issues that I haven't considered yet, or which may be related to the above areas in some way.