I use 'em all at some point or another.
Big saws - 41" Cannon, 25" GB ProTop, and 25" Stihl hardnose. Round chisel on the shorter bars, semi-chisel skip on the 41". These saws are rarely used for any productive purpose. Sometimes use the 25" GB setup to rip firewood rounds in half to make hand-splitting easier.
066 - 28" Carlton(Tsamura), 20" Windsor SpeedTip. Full-comp WoodsmanProX and GB semi-chisel in 20" and full-comp WP-X in 28", plus some ripping chain and some milling-only bars up to 36", too. 28" sees the most use.
7900 - 20" Cannon, 28" Oregon PowerMatchPlus. All sorts of square chisel, round chisel, or semi-chilsel on the 20" bars, GB round chisel skip on the 28". Dolmar 7900 + Cannon 20" sees the most use of any of my saws, past or present.
154 - Bailey's 16" Carton TimberChamp B/C combo. WoodsmanPro round chisel chain.
238 - 13" Oregon MicroLitePro NK, 95vp and 20nk. This setup is really, really growing on me as a limber and a firewood saw - what it lacks in speed (which isn't as lacking as you might think) it makes up for in being very light and nimble.
3400 - 14" Oregon Pro91, Stihl PM and GB 3/8"LP semi-chisel. GB holds up really well when abused (after hitting the feed wheels while cutting stuff that is not feeding into the chipper, for example). This is the only saw that is stored bar-on at home, and as the go-to saw at home it gets used for all kinds of tasks - cutting boards, cutting stuff that won't fit in the trashcan, making starter holes for wedges when splitting, etc.