I love the Flamethrower...
Every squad has one. He/she goes on ahead, as assault trooper. The others cover his/her deployment from range. Perfect to clear houses from a window, when aliens has no way to retaliate.
Perfect when they exit houses... just put him/her two/three spaces away (to avoid close combat, which could kill him/her in one shot with kerr blades or plasma blades) and everyone gets burned and charred...
Playing Normal, that's it, but the FT is just great to see, too...
How I feel powerful when shooting an Inferno burst....