We're still low on reliable seed nodes, see http://seeds.quisquis.de/bitshares.html .
If you want to run a seed node you should apply this fix to avoid crashes:
https://github.com/abitmore/bitshares-2/commit/aa844f56faac4dda0d542520a672c4704fb0e617
And please use port 1776 for the p2p socket. That will make your node reachable under our new DNS seed seeds.bitshares.eu:1776 .