Well, I know this is just based on personal experience ;) but this is what I feel: My favorite for daylight is Fuji Provia, both 100 and 400. The 100 is really dark, so you have to becarefull for underexposure when shooting indoors or at lower light. But especially in bright situations it always blows me away. The 400 is very nice for low light, like dusk/dawn moments, but not night. I'll post some examples tonight of photos I made at an indoor car show last weekend, with both Provia 100 and Sensia 100...the difference is amazing. I tried out Kodak Ektachrome 64 for the first time a few weeks ago (see my gallery) and I liked it too, but not as much as the Provia. It's very blue-ish, and it's not very forgiving to mistakes.....for me it's one of the most expensive films too. Errr...lemme see....I've used a lot of Velvia, but it's a bit more expensive than Provia, and where I buy it they have it stored outside the fridge, so I guess it's not the real proffesional Velvia film. Not sure, but it's weird. Velvia is much brighter than Provia and Ekta, eventhough it's only 50. Personally I'd go for Velvia for interior shots, just cause it's not that easily underexposed as Provia. Outside is Provia for me....all the time, except when it's really night. Haven't had the chance to try out several films when shooting stuff like neon lights or so. Hope that helps....good luck =)