Possible trajectories across the country

Google's default:

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This one is interesting because we haven't really driven through any of those middle states, so it would be different scenery.  However, the weather might present a problem.  Hard to say.  Definitely depends on how quickly we need to get there.

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Less chance of snow (without taking the oft-used I-10):

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Not as direct, but still not doing the I-10 thing.  We kind of like this one.  Might be able to drive on Route 66 for part of it.

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Using I-10 going up California:

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This is the route we have usually taken when going from Florida to California.  I've driven it twice.  It goes through the widest part of Texas and, boy, is that sole-destroying.  I did put in a stop-over in Austin though, to make it more interesting.  There are some friends there we could visit.  And there's a stop-over in San Fran.  Friends there, too.  There's also people we could see in Arizona and Los Angeles, but we'd prefer to steer cleer of LA during this trip.