I mine scrypt with ASICs for some years and now if you want to get in the game you should start with ASICs that delivery at least 50-100MH/s. That was the range that I started with, it required a group of ASICs. Now you can have that kind of power with a "single" box.

Old scrypt miners are becoming like old sha256 miners, people are starting to solo mine litecoin like they do with bitcoin. I'm still making profit from scrypt coins though.

Back in the early days, there were some shit coins out there, this doesn't seem to happen with scrypt anymore to the best of my knowledge. Shit coin creators seem to be targeting GPU miners, since that's where the hype is.

If you want to surf the wave, you should check X11 ASICs which are getting popular as of this writing. There seem to be some new ASICs that advertise as being "multi algorithm", I don't have real world intel on that, I suggest much research (such intended).