What I do is use a six-cup Bodum. I haven't had trouble with the leaves expanding so much that they fill the infuser basket. I give them a stir or two while they steep to make sure that they are contacting water as freely as possible. And then when the tea is ready I can just depress the plunger and drink at my leisure (which can be quite awhile...I have been known lately to have to reheat my tea in the microwave.) The thing for me is, if it's just regular tea (my assams or basic blacks...everyday) I don't want to have to go through a whole big production to get a cup of tea. And I usually don't want to use a teabag. But if I'm doing greens, I definitely don't use my Bodum. Lately for those I either gaiwan (if I can stay close to the kitchen to get more hot water or if I'm industrious enough to get a thermos of hot water ready for carrying around) or I've also been using the steep-in-a-mason-jar-and-decant method. Which I like a lot. With greens I don't mind as much that the tea cools down, but with the basic black tea I want it reasonably hot. Not scalding, but not tepid.
The thing is though that when I started (a whole six or seven months ago) I wanted something that would get me steeping loose leaf quickly and fairly easily. I didn't want to have it be very complicated at the start, because for me it was about getting to taste the tea and not all the fru fru that can go along with it (not that fru fru doesn't have its place). And I didn't want to do the "make it in one pot and decant into another" because that involves a) owning two teapots of roughly the same size that can both hold their heat rather well and b) heating both said pots. Meaning that I have to boil two pots of water here (or use hot tap water to heat the one to receive the decantings, which is an option I admit). Heating two pots is sort of a pain when all I want is a basic cup of tea..or many basic cups of tea. I'll do it (decant into a second heated pot) if I really want to experience using my other (nice handmade)ceramic pot. Otherwise...I don't want to fuss.
Something about using the holes in the teapot to filter out the leaves...I have been finding (at least with my greens..different fish there) that even tea "dust" getting in will turn them bitter if left in long enough. Even if I'm using the filter built into the inside of the teapot, unless I'm drinking quickly (gongfu) I use a second strainer to get out the little stuff.
I guess my main point here is that for me, the biggest thing that made it easy for me to get into brewing loose leaf in the first place (and thus opened up the whole world of teas to me...as well as tisanes I might add) was a filter pot. Soooo...I like em.