Fenix was the first non Surefire/Photon flashlight brand I'd ever really tried. This was before I discovered all you loonies on CPF. (What a relief it was to find I wasn't alone in my fondness for flashlights! Thank you all.)
First up was the LD01 twisty. I really liked the size/brightness, fit/finish/build, and of course the price! (Being used to Surefire's prices, I was pleasantly surprised.) Next up was the PD20 Q5. I have an inordinate fondness for this model. I don't like the redesigned body shape of the newer PD20. The one I have just brings to mind all my old SF fantasies of jetpacks and rocketcars! What a cool body design.
Well next came the SS LD01 and the LD05. The LD05 is another favorite of mine. The clicky switch is so tactilely perfect, the build and fit and finish so perfect (just so solid and substantial), that in spite of my appreciation for the Preon 2, I'd leave the Preon for the LD05 in a heartbeat if it ever came down to a choice.
In between I discovered HDS/Ra, 4Sevens, Nitecore, Jetbeam, Olight, Lumapower and the jewel of my growing collection, the Muyshondt Nautilus Ti. Oh and let's not forget the free Fauxtons I keep giving away!

Edit: I forgot the Fenix LD10. I'm not into AA lights. I gave the uncarried and unused LD10 away to an EDCF member who sent me a handmade hiking stick. Good trade IMHO!
I prefer the size/form factor of CR123A or AAA lights.