I do both... depending on the patterns I'm playing. For walking bass lines, I tend to use 1-2-3-4. For more repetitive patterns, where 1-2-4 works as a part of the pattern better, I'll do that. But, really its all about what the part calls for.
Howerver, I think its more important to use good technique in positioning your hand... thumb and fingers appropriately/ergonomically on the neck.
Howerver, I think its more important to use good technique in positioning your hand... thumb and fingers appropriately/ergonomically on the neck.