My first radiant experience was in q3radiant... Just opened it up and got confused and closed again. Then went back to Worldcraft and CS

My next try at Radiant was Gtkradiant 1.5 alpha or beta.
Then I tried 1.4... some stuff in 1.4 is better, but all in all I like 1.5 better.
Stuff in 1.4 that I like.
Z-window, it's not needed but can save me a lot of work.
Entity angle buttons. I really liked them, they are faster to use than rotate tool.
And it has a texture paint tool, I could drag the mouse over many surfaces to apply a texture. Also a tool to save a lot of time.