I used to play 40K as a young teenager and collected Imperial Guard (Catachans). Still have some of my models but plenty will be illegal now, and the paint jobs are awful regardless.
Anyway a few at work are in a similar position and now late 20s to mid 30s were talking about it and maybe having a few games. However the GW website is pretty poor when it comes to introducing the factions; Imperial Guard isn't called that any more, but what I'm looking for is a summary of all the armies, their play style, what the grunt units are and what are some of the more interesting but 'likely to be used' units are... if that make sense.
Basically so I can see what would be interesting to paint and play with.
If anyone can recommend then I used to like armies that had interesting, one-off units with unique abilities (we used to play totally illegally by fielding like 5 commisars...), where tactics are more interesting than sending ratlings to their slaughter via a million D20s. I don't have the time, patience or interest any more to be painting skin I don't think, so something armoured or alien. And I did like vehicles (sentinels for example). Not interested in Space Marines or anything else basic. Also not interested in Orcs, just don't like the clutter of the models.