Have you been part of an SMP before? Yes, a few. Most have been reasonably active for a short time and then fizzle out, and I'm stuck playing single player =/
How active would you be? Very. I play roughly 3-4 nights a week for about 2-4 hours at a time.
How do you play Minecraft (builder, redstone/farmer, explorer, etc.)? Love building redstone based farms and bases. I need to work on my interior design skills though.