in how close siblings are in their relationships?

Several people told me that we should have kids as soon as possible so that their age gap is smaller, therefore upping their chances of being closer in their sibling relationships.

My brother and I are 20 months apart and though we had our share of fights are truly close friends and siblings.

This did play a factor into our family planning, but still not enough for me to want 2 under 2. I did just tell DH last night though that if we ever decide to go for #3 (we are just ttc#2 now) that I'd want to try asap so that the age gap between DS and #3 wouldn't be too large.

What do you think?