[Taqwus]

Played GalCiv. Eventually got turned off by the crash bugs, the slow beginning of the game, the AI knowing all the yellow stars, the inevitable waste due to empire-wide sliders, the asymmetrical diplomacy (e.g. AI's discriminated against players in willingness to trade tech, IIRC), and the minors starting with loads of cash.

Played SEIV for quite a longer time; that's actually when I registered for this board. Had more fun with it, and with the intricate ship design (not unusual for me to end up with double-digit numbers of non-obsolete ship/item classes... heavy-cannon ships, fire-every-turn ships, fast/heavy invasion transports, biowarfare ships, warpships, carriers, recon ships, recon sats, defense sats, point-defense ships, repair/shipyard ships, missile ships, pro/anti-mine ships, cloaked deep-penetration raiding ships, capture ships, fast/heavy colony killers, and the occasional cloaked star destroyer). And with the ability to augment the tech tree, even more fun. I eventually stopped after the level of micro got to me (e.g. keeping a notepad indicating which colonies needed atmosphere converters, which colonies were next in line for conVersion from M/O/R resource items to Monolith IIIs, which systems needed system-wide computers etc).