1. I prefer forward clickies and find it easy to pick my mode with a forward clicky. Having said that, the Fenix clicky doesn't give me problems. It is a BIT too soft so I sometimes fully click it when I only want to tap it, or sometimes tap it when I didn't want to at all. This is my first Fenix with a clicky, all my previous ones were twisties, so no past experience with the clickies, but I have read of clicky failures in the first gen L1Ps, but none since then.
2. I like the twist to change level feature. It allows me to know which level it will come on in (like my Dereelight CL1Hs). BUT, it would be really nice if the head were knurled as it can be slippery.
3. I think Fenix has come a long way in quality and durability. Initially, they had worse machining, less durable anodizing, and drivers that were not very efficient (tho, their competitors at that time were worse, so they still looked better, but better doesn't mean it was good). Since then, I think they've improved greatly on both the anodizing durability and driver efficiency. They now have some of the best drivers. Fenix's anodizing isn't my preferred due to the slickness and shininess (I prefer more matte), but they're fairly durable. Fenix anodizing is still not as durable as Luxogens though (the HAIII ones purchased thru Waion)...those take a serious beating. I think their machining quality has improved the least, tho still improved. There still seems to be some variance on different models...some seem really well made, others are ok. Overall, Fenix is one of the leading brands IMO for combination of price, quality, and performance. I'd say Fenix, Dereelight, and Olight are the leaders in this category. Lumapower and Huntlight are great too, but they cost considerably more.