I'll give you my 2 cents in two parts.....
As a LL reviewer I only get on submitters about templates if they use the same one (same color scheme, same layout, same banners/text) over and over, one right after the other. Switch up your templates and don't submit the same ones all the time and you'll be fine.
As a free site builder, I went over a year without reusing a template once and realized that was stupid. Now I personally will reuse a template about 3 times. When I reuse them though, I change the background color, background, make a new logo, new enter button, change the recip table color, switch up the placement of the warning, etc. but I use the general layout so it's not too much work for me when I'm being lazy. Sometimes lately I'll even use the same sponsor promos.
Hope that helps!
