We are in the middle of a building project so lighting is very present in my brain!
It depends on your budget. I usually buy our floor lamps from Home Depot, Lowes, Wal-Mart or Target. By the time the light dies, my tastes have changed, so it works well. But for lighting to be installed, I usually go with a lighting store for better quality.
Kichler is a brand I often use for installed lighting. It's sometimes more pricey than the Home Depot products of the world, but they're not outrageous. It's a decent mid-range product and you have lots of choices. (For all I know, maybe one of the chains carries this brand as well.)
For ceiling fans, we have several Quorum ceiling fans that we have loved--decent price, nice quality, attractive choices (slightly funky switches). These are from a local lighting store. The lighting store I normally use, now mostly sells Casablanca fans, rather than Quorum, which are much more expensive. We will have one installed shortly with a project, but I can't comment on it's quality yet. We'll see whether it was worth it or if we should have just gone with the Quorums.
Any light can basically be wired with a dimmer, I believe. Good for conserving energy and for setting a mood.
If you have the wiring for a ceiling fixture, I would encourage adding a light/fan fixture. We've got those in all of our bedrooms and we rarely need AC now. If you don't have ceiling fixtures, I might just stick with floor lamps. Personally, I like ceiling fixtures, but my husband HATES the "glare" of them...even if they are turned low. It's just a preference thing.
For canister lights, just be aware of insulation issues. Canister lights are great for focused lighting. I love them. But if you are thinking of lighting adjacent to your roof, you can compromise the effectiveness of your insulation, even with insulated units. So, talk with someone knowledgeable regarding the insulating factor.
Lastly, there is a lot of great innovation coming with respect to LED lighting. You might want to consider something like that if available. LEDs use MUCH less electricity than traditional or even compact fluorescents.
Stay clear of halogen lighting--uses lots of electricity and burns hot.
That ought to give you something to chew on. Enjoy whatever lights you choose!
P.S. Our living room is the only room that doesn't have ceiling lights. I don't know this for a fact, but that must be pretty standard. I guess people tend to like floor lamps for living rooms?