No

I play 4-5 games across the wii/DS. Mostly it's because I get stuck on a game, and then frustrated with it, and then switch games. When I calm down, or get a stroke of inspiration, then I come back to it.

I'm normally playing a few different games at once, although my back log is starting to grow which is a concern.

yes but I hate doing that.

I thought you meant two games at the same time.

Which I do on occasion actually.

I'll play one game for a bit, then while it's loading i'll play another game... complete the session or battle, then switch back to the game thats done loading and such.

Works well when the second game has small battles like Final Fantasy Tactics or Pokemon.

I'm in the middle of like 5 games but I will probably never go back to them, mostly from lack of interest:

Eternal Darkness
Star Fox Adventures
Fire Emblem Wii
Zelda II: Adventure of Link
Zelda: Oracle of Seasons

and a whole bunch more.

Happens all the time, currently I'm playing:

Sins of a Solar Empire
The Witcher
Doom3
Never Winter Nights 2
Bioshock
No More Heroes
FF12 Revenant Wings
FF4

Slowly I'll either beat or get bored of games and so the list slowly changes over time.

I usually try to play one game at a time. But right now I'm currently playing Fable 2, Fallout 3, Tomb Raider: Anniversary, and Lost Odyessy. I also go back to Gears of War 2 and Call of Duty: World at War for the multiplayer.

right now im playing, jak 2, fallout 3, sly 2, dragonquest 8, dark cloud 2.

Whatever whim hits me. If I feel like pouring a hundred hours into a game before it gets boring, I do that. If it gets boring after 10-15 minutes I'll stop and maybe try to pick it up a few days later (if I don't hit 100 hour game first). If it seems worth picking up again, I might.  At one point I was juggling 5-6 games that were only entertaining for short moments (on the DS), but then I found DQMJ and haven't played anything else since (after ~70 hours).