Of course I have a whole bunch of REALLY strong opinions on this subject ;-)
I LOVE fishing with my G-Loomis SR 720's (rated for 1 to 4 lb mono) and an ultra light Okuma Inspira.
But the thing is, regardless of what gear I'm using, or what species I'm fishing for, I absolutely HATE kinky, coily, sttrreeeeeettcchy monofilament (as a main line).
I know their are guys who will say, but if your using 10 lb test braid, that's not micro-light..... and in their own minds, thier trying to compare 10 lb braid, to 10 lb mono. However, that's like comparing apples to oranges. If one were to put 2 lb diameter / 10 lb braid, on a medium weight rod rated for 10 lb mono, and then treated it like 10 lb mono (medium to heavy drag settings, hard hook sets, etc) he would be breaking off a lot of fish, and / or ripping hooks out.
IMPO, 2lb dia/ 10lb test braid, is WAY better suited for use on a micro-light rod.
Also, if a guy feels like he needs to "limit himself / his tackle strength" so that he can feel he has made a bigger acomplishment, then he can just run a 4lb or even 2lb test mono leader, in conjuction with 2/10 braid. Of course this will match up beautifully.
Here's a bunch more info if your interested;
http://www.trophybassonly.com/id139.htm
Peace,
Fish
PS, The size or species of fish I'm after, has little to do with the gear I choose for it. For me, it's mostly the bait / lures, which determine the size of the gear. In other words, I will use a heavy action rod, with 50 lb braid, for big heavy swimbaits, and I might only catch 3 to 8 lb bass on it.
But then I almost always use the micro-light for crawler fishing, where I might be fishing for bass from 10 to 13 lbs, or more.