X-com terror from the deep
Ultima VII - the black gate
Ultima underworld
Wing commander
System shock II
C&C gold
Stronghold
Dungeon master II
Sundog - the frozen legacy
Lords of the realm
Corporation
Defender of the crown
Megatraveller - quest of the ancients
syndicate
To be honest out of those I only enjoyed Syndicate. Has to be the Amiga or at very least the PC version (what the heck did they do the MD/SNES one eh?). Most of those other games I just find incredibly dull to be honest though Wing Commander had some nice music at least.
I'm gonna stick up for the PSP as out of all the game consoles I've owned I've probably bought the second most amount of games for it and enjoyed everyone I bought. Only my PS2 collection takes up more room on my shelves.
For example I enjoy various sequels on the PSP such as GTA VCS, GTA LCS, God of War - Chains of Olympus, Metal Gear Solid Portable Ops, Burnout Legends, Ratchet & Clank - Size Matters, Daxter, Ridge Racer 2 and both Syphon Filter games.
I've enjoyed plenty ports which have usually been either as good as the best home version or in some cases even superior. The Warriors is one of my all time favorite video games and while I already own it on PS2, I was happy to purchase it again for PSP because it's identical and not turned into some barely recognisable piece of crap that just bears the name such as it likely would on the GBA or the DS so now I can now play it wherever I like. Medievil Resurrection was good too. As were Street Fighter Alpha 3 Max (the most complete incarnation of the game available), Guity Gear Judgment (includes Guilty Gear XX #Reload too, the Judgment scrolling beat em up game is PSP exclusive I think), Virtua Tennis 3, PowerStone Collection (making my Dreamcast almost redundant), Lego Star Wars 2, Castlevania - Symphony of the Night and so on. Again the big advantage being I can take these and go play them in a nice quiet place like the park rather than try to get through the games here in the noisy flat. I would say there's not been enough original games on the PSP but I've still found ones I enjoy a lot like Dead Head Fred and heck I even sorta enjoyed Final Fantasy - Crisis Core and I usually despise the Final Fantasy games with a passion.
I got a friend who likes almost a totally different selection of games mainly consisting of strategy rpg things like Jean De Arc (think that's what it's called at least), and Monster Hunter G and puzzle games like Puyo Puyo and Crush. And she likes stuff like Patapon and Locoroco (can't stand either one myself but that's what variety is for)
The PSP is pretty much my main games console at present. I don't play anything on PC these days bar the odd indie game now and then (I loathe commercial PC games). And the PS2's usually switched on for those games I don't have on PSP and obviously for easier multiplayer. Just annoys me when people say it's got no good games, cos I sure ain't had all that much trouble finding plenty PSP titles to get and take about with me.
Think the only purchase I hated was Mega Man Powered Up. Now I normally like Mega Man and Maverick Hunter X was a fairly decent remake... but Powered Up is so sickenly cute I nearly vomited on my PSP. That's the only PSP game I've taken back to the store and traded in.