Maxim tends to go into the same pile as Linear and AD for me. Some nice devices, good for low volume high value runs, but for products in larger volume lower value markets their price points usually just don't work.
Even for a commodity item like a Li-ion charger, it's often cheaper to roll your own for medium to high volume and you have the benefit of a customising it to your own needs.
On the other side of the "pile" are the likes of TI, Microchip and NXP. Microchip seem to be coming out with some pretty nice commodity devices these days, often as a result of their more recent takeovers, things like regulators, opamps, Li-ion chargers, MOSFETs, LAN and USB phy side bits and pieces etc., usually at very competitive pricing. A couple of years ago I wouldn't have even considered Microchip for these sorts of devices.
The most frustrating thing is when you come across stripped down datasheets in some markets, and have to go through the hoops to try to get access to sufficient information and samples. I really just don't get this mentality. You'd have thought they wanted to sell their chips, and putting up barriers like this just puts me right off.
What I would say is that anecdotally over the last 18 months or so availability of parts seems to have recovered from the shortages primarily due to the 2011 tsunami.