I have created page with a list of compatible software:
http://www.natami-news.de/html/compatibility.html(tested with my own 68k distribution but should work with Icaros too)
Defender of the crown does not work (as most cinemaware games except Wings).
You can use the preinstalled ROMs (Aros Replacement ROMs) or AmigaForever. On my page I have concentrated on what is preinstalled but there is also a description how to integrate AmigaForever in Aros.
TVPaint works and is preinstalled in both Aros Vision and Icaros. In Icaros you must first start "Aros M68k" from Amistart->Amibridge. Then you can start applications by doubleclick.