Like Jozxyqk I have been a long time user of DarkPlaces. Back in the day I did use other engines, like TomazQuake, FTE, even tried out Tenebrae for a little while…
But yeah, in a large part due to familiarity with DP I turn to it by default, with the exception being the latest release on Kex. Kex feels… fine, I guess. But I’m looking forward to some of those older engines getting updated for the new formats.