All Heroes games are great but i must say army building and siege fights was best in HOMM3. But i enjoyed the storys in the campaigns in HOMM4 best. HOMM5 i didn't get to finish before my hard drive crashed and after that i never downloaded it again but now that you have reminded me about it i think i will give it another try and check those campaigns out.
How do you compare the campaigns from the 5th game against 3rd and 4th?