They look great! I also like how you've based your minis so they can rank/mob up tightly- was that for a particular game or just because you like it?
Thanks for the kind words.
My 25mm and early 28mm collections date way back to 1960s long before the "slotta base" period. The vast majority of my figures, like these, are on card bases 15mm frontage and 20mm depth for infantry and 20mm to 25mm frontage for mounted (depends on the steed) with quite a few of the more recent 28mm, Heroic, 32mm wide legged posers I try to fit on 20mm circles. The really wide legged ones go on card cut to the smallest size that will support them. I give the surplus slottabases to my brother who bases all his figures on them in exchange for figures. Only a few monsters and really large figures go on larger circular bases. Generally I like the figures to be on the best and smallest base that supports them on the table.
The rules we use long predate slotta bases and don't specify base sizes. Measurements are head to head for movement and range. We like massed battles. Regiments in close order we like to look as if they are shoulder to shoulder. 25mm, 28mm even 32mm figures on 25mm to 32mm bases look more like Open Order. We have had a discussion about bigger bases for 2-handed weapons but many modern figures are so huge and athletically posed that they take up more space even on small bases.
And, as you say, they are that way because I like the look.